Publications

    GraFOx Publications 2023

    Montag, S., Splith, D., Kneiß, M., Grundmann, M., Garcia Fernandez, J., Prytz, Ø., & von Wenckstern, H. (2023). Cation segregation observed in an (In,Ga)₂O₃ material thin film library beyond the miscibility limit of the bixbyite structure. Physical Review Materials, 7(9), 094603. https://doi.org/10.1103/PhysRevMaterials.7.094603
    Hoffmann, G., Zupancic, M., Klimm, D., Schewski, R., Albrecht, M., Ramsteiner, M., Zohair, F., & Bierwagen, O. (2023). Adsorption-controlled plasma-assisted molecular beam epitaxy of LaInO3 on DyScO3 (110): Growth window, strain relaxation, and domain pattern. Physical Review Materials, 7(8), 084605. https://doi.org/10.1103/PhysRevMaterials.7.084605
    Maudet, F., Dijck, C. V., Raza, M. H., & Dubourdieu, C. (2023). A fully automatized method for the unambiguous wavelength-by-wavelength determination of the thickness and optical property of a very thin film with a transparent range. Journal of Applied Physics, 134(4), 045301. https://doi.org/10.1063/5.0150135
    Van Dijck, C., Maudet, F., Dubourdieu, C., & Deshpande, V. (2023). Amorphous GaOx based charge trap memory device for neuromorphic applications. Solid-State Electronics, 207, 108717. https://doi.org/10.1016/j.sse.2023.108717
    Köpp, S., Petersen, C., Splith, D., Grundmann, M., & von Wenckstern, H. (2023). Properties of Schottky barrier diodes on heteroeptixial α-Ga2O3 thin films. Journal of Vacuum Science & Technology A, 41(4), 043411. https://doi.org/10.1116/6.0002651
    Chen, W., Egbo, K., Tornatzky, H., Ramsteiner, M., Wagner, M. R., & Bierwagen, O. (2023). In situ study and modeling of the reaction kinetics during molecular beam epitaxy of GeO2 and its etching by Ge. APL Materials, 11(7), 071110. https://doi.org/10.1063/5.0155869
    Schultz, T., Kneiß, M., Storm, P., Splith, D., von Wenckstern, H., Koch, C. T., Hammud, A., Grundmann, M., & Koch, N. (2023). Growth of κ-([Al,In]ₓGa₁₋ₓ)₂O₃ Quantum Wells and Their Potential for Quantum-Well Infrared Photodetectors. ACS Applied Materials & Interfaces, 15(24), 29535–29541. https://doi.org/10.1021/acsami.3c02695
    Petersen, C., Vogt, S., Kneiß, M., von Wenckstern, H., & Grundmann, M. (2023). PLD of α-Ga₂O₃ on m-plane Al₂O₃: Growth regime, growth process, and structural properties. APL Materials, 11(6), 061122. https://doi.org/10.1063/5.0149797
    Kluth, E., Anhar Uddin Bhuiyan, A. F. M., Meng, L., Bläsing, J., Zhao, H., Strittmatter, A., Goldhahn, R., & Feneberg, M. (2023). Determination of anisotropic optical properties of MOCVD grown m-plane α-(AlₓGa₁₋ₓ)₂O₃ alloys. Japanese Journal of Applied Physics, 62(5), 051001. https://doi.org/10.35848/1347-4065/acd095
    Tetzner, K., Klupsch, M., Popp, A., Bin Anooz, S., Chou, T.-S., Galazka, Z., Ickert, K., Matalla, M., Unger, R.-S., Treidel, E. B., Wolf, M., Trampert, A., Würfl, J., & Hilt, O. (2023). Enhancement-mode vertical (100) β-Ga₂O₃ FinFETs with an average breakdown strength of 2.7 MV cm −1. Japanese Journal of Applied Physics, 62(SF), SF1010. https://doi.org/10.35848/1347-4065/acbebc
    Baki, A., Abdeldayem, M., Morales, C., Flege, J. I., Klimm, D., Bierwagen, O., & Schwarzkopf, J. (2023). Potential of La-doped SrTiO₃ thin films grown by metal–organic vapor phase epitaxy for thermoelectric applications. Crystal Growth & Design, 23(4), 2522–2530. https://doi.org/10.1021/acs.cgd.2c01438
    Egbo, K., Lähnemann, J., Falkenstein, A., Varley, J. B., & Bierwagen, O. (2023). Acceptor and compensating donor doping of single crystalline SnO (001) films grown by molecular beam epitaxy and its perspectives for optoelectronics and gas-sensing. Applied Physics Letters, 122, 122101. https://doi.org/10.1063/5.0130935
    Kluth, E., Fay, M., Parmenter, C., Roberts, J., Smith, E., Stoppiello, C., Massabuau, F., Goldhahn, R., & Feneberg, M. (2023). Redshift and amplitude increase in the dielectric function of corundum-like α-(TiₓGa₁₋ₓ)₂O₃. Applied Physics Letters, 122(9), 092101. https://doi.org/10.1063/5.0139725
    Reis, A., Hanke, M., Bierwagen, O., Trampert, A., Mazzolini, P., & Welter, E. (2023). Disorder–Order transition in Ga₂O₃ and its solid solution with In₂O₃ upon thermal annealing. Physica Status Solidi (b), 2200535. https://doi.org/10.1002/pssb.202200535
    Jaber, N., Feldl, J., Stoever, J., Irmscher, K., Albrecht, M., Ramsteiner, M., & Schwarzkopf, J. (2023). Thermally activated increase of the average grain size as the origin of resistivity enhancement in NbO₂ films grown by pulsed-laser deposition. Physical Review Materials, 7(1), 014601. https://doi.org/10.1103/PhysRevMaterials.7.014601
    Galazka, Z., Fiedler, A., Popp, A., Ganschow, S., Kwasniewski, A., Seyidov, P., Pietsch, M., Dittmar, A., Anooz, S. B., Irmscher, K., Suendermann, M., Klimm, D., Chou, T.-S., Rehm, J., Schroeder, T., & Bickermann, M. (2023). Bulk single crystals and physical properties of β-(AlₓGa₁₋ₓ)₂O₃ (x = 0–0.35) grown by the Czochralski method. Journal of Applied Physics, 133(3), 035702. https://doi.org/10.1063/5.0131285
    Egbo, K., Luna, E., Lähnemann, J., Hoffmann, G., Trampert, A., Grümbel, J., Kluth, E., Feneberg, M., Goldhahn, R., & Bierwagen, O. (2023). Epitaxial synthesis of unintentionally doped P-type SnO (001) via suboxide molecular beam epitaxy. Journal of Applied Physics, 133(4), 045701. https://doi.org/10.1063/5.0131138

    GraFOx Publications 2022

    Rehm, J., Chou, T.-S., Anooz, S. B., Seyidov, P., Fiedler, A., Galazka, Z., & Popp, A. (2022). Perspectives on MOVPE-grown (100) β-Ga₂O₃ thin films and its Al-alloy for power electronics application. Applied Physics Letters, 121(24), 240503. https://doi.org/10.1063/5.0122886
    Vogt, S., Petersen, C., Kneiß, M., Splith, D., Schultz, T., von Wenckstern, H., Koch, N., & Grundmann, M. (2022). Realization of conductive N-type doped α-Ga₂O₃ on M-plane sapphire grown by a two-step pulsed laser deposition process. Physica Status Solidi (a), 220(3), 2200721. https://doi.org/10.1002/pssa.202200721
    Klimm, D., Amgalan, B., Ganschow, S., Kwasniewski, A., Galazka, Z., & Bickermann, M. (2022). The thermal conductivity tensor of β-Ga₂O₃ from 300 to 1275 K. Crystal Research and Technology, 58(2), 2200204. https://doi.org/10.1002/crat.202200204
    Seyidov, P., Varley, J. B., Galazka, Z., Chou, T.-S., Popp, A., Fiedler, A., & Irmscher, K. (2022). Cobalt as a promising dopant for producing semi-insulating β-Ga₂O₃ crystals: Charge state transition levels from experiment and theory. APL Materials, 10(11), 111109. https://doi.org/10.1063/5.0112915
    Pfützenreuter, D., Kim, S., Cho, H., Bierwagen, O., Zupancic, M., Albrecht, M., Char, K., & Schwarzkopf, J. (2022). Confinement of electrons at the LaInO₃/BaSnO₃ heterointerface. Advanced Materials Interfaces, 9, 2201279. https://doi.org/10.1002/admi.202201279
    Guimaraes, M. de O., Richter, C., Hanke, M., Anooz, S. B., Wang, Y., Schwarzkopf, J., & Schmidbauer, M. (2022). Ferroelectric phase transitions in tensile-strained NaNbO₃ epitaxial films probed by in situ x-Ray diffraction. Journal of Applied Physics, 132(15), 154102. https://doi.org/10.1063/5.0113949
    Wang, Y., Bin Anooz, S., Niu, G., Schmidbauer, M., Wang, L., Ren, W., & Schwarzkopf, J. (2022). Thickness effect on ferroelectric domain formation in compressively strained K0.65Na0.35NbO₃ epitaxial films. Physical Review Materials, 6(8), 084413. https://doi.org/10.1103/PhysRevMaterials.6.084413
    Chou, T.-S., Bin Anooz, S., Grueneberg, R., Dropka, N., Miller, W., Tran, T. T. V., Rehm, J., Albrecht, M., & Popp, A. (2022). Machine learning supported analysis of MOVPE grown β-Ga₂O₃ thin films on sapphire. Journal of Crystal Growth, 592, 126737. https://doi.org/10.1016/j.jcrysgro.2022.126737
    Vorwerk, C., Sottile, F., & Draxl, C. (2022). All-electron many-body approach to resonant inelastic X-ray scattering. Physical Chemistry Chemical Physics, 24(29), 17439–17448. https://doi.org/10.1039/d2cp00994c
    Chou, T.-S., Bin Anooz, S., Grueneberg, R., Dropka, N., Rehm, J., Tran, T. T. V., Irmscher, K., Seyidov, P., Miller, W., Galazka, Z., Albrecht, M., & Popp, A. (2022). Si doping mechanism in MOVPE-grown (100) β-Ga₂O₃ films. Applied Physics Letters, 121(3), 032103. https://doi.org/10.1063/5.0096846
    Ardenghi, A., Bierwagen, O., Falkenstein, A., Hoffmann, G., Lähnemann, J., Martin, M., & Mazzolini, P. (2022). Toward controllable Si-doping in oxide molecular beam epitaxy using a solid SiO source: Application to β-Ga₂O₃. Applied Physics Letters, 121(4), 042109. https://doi.org/10.1063/5.0087987
    Hamada, M., Ganschow, S., Klimm, D., Serghiou, G., Reichmann, H.-J., & Bickermann, M. (2022). Wüstite (Fe₁₋ₓO) - Thermodynamics and crystal growth. Zeitschrift Für Naturforschung B, 77(6), 463–468. https://doi.org/10.1515/znb-2022-0071
    Janzen, B. M., Gillen, R., Galazka, Z., Maultzsch, J., & Wagner, M. R. (2022). First- and second-order Raman spectroscopy of monoclinic β-Ga₂O₃. Physical Review Materials, 6(5), 054601. https://doi.org/10.1103/PhysRevMaterials.6.054601
    Bin Anooz, S., Wang, Y., Petrik, P., de Oliveira Guimaraes, M., Schmidbauer, M., & Schwarzkopf, J. (2022). High temperature phase transitions in NaNbO₃ epitaxial films grown under tensile lattice strain. Applied Physics Letters, 120(20), 202901. https://doi.org/10.1063/5.0087959
    Papadogianni, A., Nagata, T., & Bierwagen, O. (2022). The electrical conductivity of cubic (In₁₋ₓGaₓ)₂O₃ films (x ≤ 0.18): Native bulk point defects, Sn-doping, and the surface electron accumulation layer. Japanese Journal of Applied Physics, 61(4), 045502. https://doi.org/10.35848/1347-4065/ac4ec7
    Guguschev, C., Richter, C., Brützam, M., Dadzis, K., Hirschle, C., Gesing, T. M., Schulze, M., Kwasniewski, A., Schreuer, J., & Schlom, D. G. (2022). Revisiting the growth of large (Mg,Zr):SrGa₁₂O₁₉ Single crystals: Core formation and its impact on structural homogeneity revealed by correlative X-ray imaging. Crystal Growth & Design, 22(4), 2557–2568. https://doi.org/10.1021/acs.cgd.2c00030
    Galazka, Z., Ganschow, S., Seyidov, P., Irmscher, K., Pietsch, M., Chou, T.-S., Bin Anooz, S., Grueneberg, R., Popp, A., Dittmar, A., Kwasniewski, A., Suendermann, M., Klimm, D., Straubinger, T., Schroeder, T., & Bickermann, M. (2022). Two inch diameter, highly conducting bulk β-Ga₂O₃ single crystals grown by the Czochralski method. Applied Physics Letters, 120(15), 152101. https://doi.org/10.1063/5.0086996
    Tetzner, K., Egbo, K., Klupsch, M., Unger, R.-S., Popp, A., Chou, T.-S., Anooz, S. B., Galazka, Z., Trampert, A., Bierwagen, O., & Würfl, J. (2022). SnO/β-Ga₂O₃ heterojunction field-effect transistors and vertical p–n diodes. Applied Physics Letters, 120(11), 112110. https://doi.org/10.1063/5.0083032
    Aggoune, W., Eljarrat, A., Nabok, D., Irmscher, K., Zupancic, M., Galazka, Z., Albrecht, M., Koch, C., & Draxl, C. (2022). A consistent picture of excitations in cubic BaSnO₃ revealed by combining theory and experiment. Communications Materials, 3(1), 12. https://doi.org/10.1038/s43246-022-00234-6
    Boy, J., Mitdank, R., Galazka, Z., & Fischer, S. F. (2022). Thermal conductivity, diffusivity and specific heat capacity of as-Grown, degenerate single-crystalline ZnGa₂O₄. Materials Research Express, 9(6), 065902. https://doi.org/10.1088/2053-1591/ac5f8a
    Lion, K., Pavone, P., & Draxl, C. (2022). Elastic stability of Ga₂O₃ : Addressing the β to α phase transition from first principles. Physical Review Materials, 6(1), 013601. https://doi.org/10.1103/PhysRevMaterials.6.013601
    Grümbel, J., Goldhahn, R., Jeon, D.-W., & Feneberg, M. (2022). Anharmonicity of lattice vibrations in thin film α-Ga₂O₃ investigated by temperature dependent Raman spectroscopy. Applied Physics Letters, 120(2), 022104. https://doi.org/10.1063/5.0074260

    GraFOx Publications 2021

    Reichmann, F., Dabrowski, J., Becker, A. P., Klesse, W. M., Irmscher, K., Schewski, R., Galazka, Z., & Mulazzi, M. (2021). Experimental and theoretical investigation of the surface electronic structure of ZnGa₂O₄ (100) single-crystals. Physica Status Solidi (b), 259(3), 2100452. https://doi.org/10.1002/pssb.202100452
    Pfützenreuter, D., Zupancic, M., Galazka, Z., Schewski, R., Dittmar, A., Irmscher, K., Albrecht, M., & Schwarzkopf, J. (2021). Epitaxial BaSnO₃ thin films with low dislocation density grown on lattice matched LaInO₃ substrates. Nanotechnology, 32(50), 505609. https://doi.org/10.1088/1361-6528/ac291c
    Kneiß, M., Splith, D., von Wenckstern, H., Lorenz, M., Schultz, T., Koch, N., & Grundmann, M. (2021). Strain states and relaxation for α-(AlₓGa₁₋ₓ)₂O₃ thin films on prismatic planes of alphaAl2O3in the full composition range: Fundamental difference of a- and m-Epitaxial planes in the manifestation of shear strain and lattice tilt. Journal of Materials Research, 36(23), 4816–4831. https://doi.org/10.1557/s43578-021-00375-3
    Galazka, Z., Irmscher, K., Pietsch, M., Ganschow, S., Schulz, D., Klimm, D., Hanke, I. M., Schroeder, T., & Bickermann, M. (2021). Experimental Hall electron mobility of bulk single crystals of transparent semiconducting oxides. Journal of Materials Research, 36(23), 4746–4755. https://doi.org/10.1557/s43578-021-00353-9
    Chou, T.-S., Bin Anooz, S., Grüneberg, R., Irmscher, K., Dropka, N., Rehm, J., Tran, T. T. V., Miller, W., Seyidov, P., Albrecht, M., & Popp, A. (2021). Toward precise N-Type doping control in MOVPE-grown β-Ga₂O₃ thin films by deep-learning approach. Crystals, 12(1), 8. https://doi.org/10.3390/cryst12010008
    Baki, A., Stöver, J., Schulz, T., Markurt, T., Amari, H., Richter, C., Martin, J., Irmscher, K., Albrecht, M., & Schwarzkopf, J. (2021). Influence of Sr deficiency on structural and electrical properties of SrTiO₃ thin films grown by Metal–Organic vapor phase epitaxy. Scientific Reports, 11(1), 7497. https://doi.org/10.1038/s41598-021-87007-2
    Hoffmann, G., Cheng, Z., Brandt, O., & Bierwagen, O. (2021). Drastically enhanced cation incorporation in the epitaxy of oxides due to formation and evaporation of suboxides from elemental sources. APL Materials, 9(11), 111110. https://doi.org/10.1063/5.0058541
    Chou, T.-S., Seyidov, P., Bin Anooz, S., Grüneberg, R., Tran, T. T. V., Irmscher, K., Albrecht, M., Galazka, Z., Schwarzkopf, J., & Popp, A. (2021). Fast homoepitaxial growth of (100) β-Ga₂O₃ thin films via MOVPE. AIP Advances, 11(11), 115323. https://doi.org/10.1063/5.0069243
    Amari, H., Schulz, T., Baki, A., Stöver, J., Richter, C., Martin, J., Irmscher, K., Schwarzkopf, J., & Albrecht, M. (2021). In-situ TEM Observations of resistance switching in strontium titanate devices. Microscopy and Microanalysis, 27(S2), 69–70. https://doi.org/10.1017/S1431927621013349
    Aggoune, W., & Draxl, C. (2021). Tuning two-dimensional electron and hole gases at LaInO₃/BaSnO₃ interfaces by polar distortions, termination, and thickness. Npj Computational Materials, 7(1), 174. https://doi.org/10.1038/s41524-021-00646-x
    Kröncke, H., Maudet, F., Banerjee, S., Albert, J., Wiesner, S., Deshpande, V., & Dubourdieu, C. (2021). Effect of O₂ plasma exposure time during atomic layer deposition of amorphous gallium oxide. Journal of Vacuum Science & Technology A, 39(5), 052408. https://doi.org/10.1116/6.0001207
    Galazka, Z., Irmscher, K., Ganschow, S., Zupancic, M., Aggoune, W., Draxl, C., Albrecht, M., Klimm, D., Kwasniewski, A., Schulz, T., Pietsch, M., Dittmar, A., Grueneberg, R., Juda, U., Schewski, R., Bergmann, S., Cho, H., Char, K., Schroeder, T., & Bickermann, M. (2021). Melt growth and physical properties of bulk LaInO₃ single crystals. Physica Status Solidi (a), 218(16), 2100016. https://doi.org/10.1002/pssa.202100016
    Grundmann, M., & Lorenz, M. (2021). Azimuthal anisotropy of rhombohedral (corundum phase) heterostructures. Physica Status Solidi (b), 258(7), 2100104. https://doi.org/10.1002/pssb.202100104
    Grundmann, M., Stralka, T., Lorenz, M., Selle, S., Patzig, C., & Höche, T. (2021). Plastic strain relaxation and alloy instability in epitaxial corundum-phase (Al,Ga)₂O₃ thin films on r-Plane Al₂O₃. Materials Advances, 2(13), 4316–4322. https://doi.org/10.1039/D1MA00204J
    Aggoune, W., Irmscher, K., Nabok, D., Vona, C., Bin Anooz, S., Galazka, Z., Albrecht, M., & Draxl, C. (2021). Fingerprints of optical absorption in the perovskite LaInO₃ : Insight from many-body theory and experiment. Physical Review B, 103(11), 115105. https://doi.org/10.1103/PhysRevB.103.115105
    Galazka, Z., Ganschow, S., Irmscher, K., Klimm, D., Albrecht, M., Schewski, R., Pietsch, M., Schulz, T., Dittmar, A., Kwasniewski, A., Grueneberg, R., Anooz, S. B., Popp, A., Juda, U., Hanke, I. M., Schroeder, T., & Bickermann, M. (2021). Bulk single crystals of β-Ga₂O₃ and Ga-based spinels as ultra-wide bandgap transparent semiconducting oxides. Progress in Crystal Growth and Characterization of Materials, 67(1), 100511. https://doi.org/10.1016/j.pcrysgrow.2020.100511
    Kockert, M., Mitdank, R., Moon, H., Kim, J., Mogilatenko, A., Moosavi, S. H., Kroener, M., Woias, P., Lee, W., & Fischer, S. F. (2021). Semimetal to semiconductor transition in Bi/TiO₂ Core/Shell nanowires. Nanoscale Advances, 3(1), 263–271. https://doi.org/10.1039/D0NA00658K
    Janzen, B. M., Mazzolini, P., Gillen, R., Peltason, V. F. S., Grote, L. P., Maultzsch, J., Fornari, R., Bierwagen, O., & Wagner, M. R. (2021). Comprehensive Raman study of orthorhombic κ/ϵ-Ga₂O₃ and the impact of rotational domains. Journal of Materials Chemistry C, 9(40), 14175–14189. https://doi.org/10.1039/D1TC03500B
    Janzen, B. M., Mazzolini, P., Gillen, R., Falkenstein, A., Martin, M., Tornatzky, H., Maultzsch, J., Bierwagen, O., & Wagner, M. R. (2021). Isotopic study of Raman active phonon modes in β-Ga₂O₃. Journal of Materials Chemistry C, 9(7), 2311–2320. https://doi.org/10.1039/D0TC04101G
    Böttcher, K., Miller, W., & Ganschow, S. (2021). Numerical modeling of heat transfer and thermal stress at the Czochralski growth of neodymium scandate single crystals. Crystal Research and Technology, 56(1), 2000106. https://doi.org/10.1002/crat.202000106
    Bin Anooz, S., Grüneberg, R., Chou, T.-S., Fiedler, A., Irmscher, K., Wouters, C., Schewski, R., Albrecht, M., Galazka, Z., Miller, W., Schwarzkopf, J., & Popp, A. (2021). Impact of chamber pressure and Si-doping on the surface morphology and electrical properties of homoepitaxial (100) β-Ga2O3 thin films grown by MOVPE. Journal of Physics D: Applied Physics, 54(3), 034003. https://doi.org/10.1088/1361-6463/abb6aa

    GraFOx Publications 2020

    Zupancic, M., Aggoune, W., Markurt, T., Kim, Y., Kim, Y. M., Char, K., Draxl, C., & Albrecht, M. (2020). Role of the interface in controlling the epitaxial relationship between orthorhombic LaInO₃ and cubic BaSnO₃. Physical Review Materials, 4(12), 123605. https://doi.org/10.1103/PhysRevMaterials.4.123605
    Wouters, C., Sutton, C., Ghiringhelli, L. M., Markurt, T., Schewski, R., Hassa, A., von Wenckstern, H., Grundmann, M., Scheffler, M., & Albrecht, M. (2020). Investigating the ranges of (Meta)Stable phase formation in (InₓGa₁₋ₓ)₂O₃ : Impact of the cation coordination. Physical Review Materials, 4(12), 125001. https://doi.org/10.1103/PhysRevMaterials.4.125001
    Niavol, S. S., Budde, M., Papadogianni, A., Heilmann, M., Moghaddam, H. M., Aldao, C. M., Ligorio, G., List-Kratochvil, E. J. W., Lopes, J. M. J., Barsan, N., Bierwagen, O., & Schipani, F. (2020). Conduction mechanisms in epitaxial NiO/Graphene gas sensors. Sensors and Actuators B: Chemical, 325, 128797. https://doi.org/10.1016/j.snb.2020.128797
    Knoop, F., Purcell, T., Scheffler, M., & Carbogno, C. (2020). FHI-vibes: Ab initio vibrational simulations. Journal of Open Source Software, 5(56), 2671. https://doi.org/10.21105/joss.02671
    Kamimura, J., Budde, M., Bogdanoff, P., Tschammer, C., Abdi, F. F., van de Krol, R., Bierwagen, O., Riechert, H., & Geelhaar, L. (2020). Protection mechanism against photocorrosion of GaN photoanodes provided by NiO thin layers. Solar RRL, 4(12), 2000568. https://doi.org/10.1002/solr.202000568
    Grundmann, M., Stralka, T., & Lorenz, M. (2020). Epitaxial growth and strain relaxation of corundum-phase (Al,Ga)₂O₃ thin films from pulsed laser deposition at 1000 °C on r-Plane Al2O3. Applied Physics Letters, 117(24), 242102. https://doi.org/10.1063/5.0030675
    Budde, M., Mazzolini, P., Feldl, J., Golz, C., Nagata, T., Ueda, S., Hoffmann, G., Hatami, F., Masselink, W. T., Ramsteiner, M., & Bierwagen, O. (2020). Plasma-assisted molecular beam epitaxy of SnO(001) films: Metastability, hole transport properties, Seebeck coefficient, and effective hole mass. Physical Review Materials, 4(12), 124602. https://doi.org/10.1103/PhysRevMaterials.4.124602
    Budde, M., Splith, D., Mazzolini, P., Tahraoui, A., Feldl, J., Ramsteiner, M., von Wenckstern, H., Grundmann, M., & Bierwagen, O. (2020). SnO/β-Ga₂O₃ pn heterojunction diodes. Applied Physics Letters, 117(25), 252106. https://doi.org/10.1063/5.0031442
    Mazzolini, P., Falkenstein, A., Galazka, Z., Martin, M., & Bierwagen, O. (2020). Offcut-related step-flow and growth rate enhancement during (100) β-Ga₂O₃ homoepitaxy by metal-exchange catalyzed molecular beam epitaxy (MEXCAT-MBE). Applied Physics Letters, 117(22), 222105. https://doi.org/10.1063/5.0031300
    Fiedler, A., Ramsteiner, M., Galazka, Z., & Irmscher, K. (2020). Raman scattering in heavily donor doped β-Ga₂O₃. Applied Physics Letters, 117(15), 152107. https://doi.org/10.1063/5.0024494
    Galazka, Z. (2020). Transparent semiconducting oxides: Bulk crystal growth and fundamental properties. Jenny Stanford Publishing.
    Papadogianni, A., Rombach, J., Berthold, T., Polyakov, V., Krischok, S., Himmerlich, M., & Bierwagen, O. (2020). Two-dimensional electron gas of the In₂O₃ surface : Enhanced thermopower, electrical transport properties, and reduction by adsorbates or compensating acceptor doping. Physical Review B, 102(7), 075301. https://doi.org/10.1103/PhysRevB.102.075301
    Knoop, F., Purcell, T. A. R., Scheffler, M., & Carbogno, C. (2020). Anharmonicity measure for materials. Physical Review Materials, 4(8), 083809. https://doi.org/10.1103/PhysRevMaterials.4.083809
    Mazzolini, P., & Bierwagen, O. (2020). Towards smooth (010) β-Ga₂O₃ films homoepitaxially grown by plasma assisted molecular beam epitaxy: The impact of substrate offcut and metal-to-oxygen flux ratio. Journal of Physics D: Applied Physics, 53(35), 354003. https://doi.org/10.1088/1361-6463/ab8eda
    Zacharias, M., Scheffler, M., & Carbogno, C. (2020). Fully anharmonic nonperturbative theory of vibronically renormalized electronic band structures. Physical Review B, 102(4), 045126. https://doi.org/10.1103/PhysRevB.102.045126
    Tillack, S., Gulans, A., & Draxl, C. (2020). Maximally localized Wannier functions within the (L)APW + LO Method. Physical Review B, 101(23), 235102. https://doi.org/10.1103/PhysRevB.101.235102
    Boy, J., Handwerg, M., Mitdank, R., Galazka, Z., & Fischer, S. F. (2020). Charge carrier density, mobility, and Seebeck coefficient of melt-grown bulk ZnGa₂O₄ single crystals. AIP Advances, 10(5), 055005. https://doi.org/10.1063/5.0002847
    Bin Anooz, S., Grüneberg, R., Wouters, C., Schewski, R., Albrecht, M., Fiedler, A., Irmscher, K., Galazka, Z., Miller, W., Wagner, G., Schwarzkopf, J., & Popp, A. (2020). Step flow growth of β-Ga₂O₃ thin films on vicinal (100) β-Ga₂O₃ substrates grown by MOVPE. Applied Physics Letters, 116(18), 182106. https://doi.org/10.1063/5.0005403
    Galazka, Z. (2020). Czochralski Method. In M. Higashiwaki & S. Fujita (Eds.), Gallium Oxide (Vol. 293, pp. 15–36). Springer International Publishing. https://doi.org/10.1007/978-3-030-37153-1_2
    Bierwagen, O., Vogt, P., & Mazzolini, P. (2020). Plasma-assisted molecular beam epitaxy 2: Fundamentals of suboxide-related growth kinetics, thermodynamics, catalysis, polymorphs, and faceting. In M. Higashiwaki & S. Fujita (Eds.), Gallium Oxide (Vol. 293, pp. 95–121). Springer International Publishing. https://doi.org/10.1007/978-3-030-37153-1_6
    Hoffmann, G., Budde, M., Mazzolini, P., & Bierwagen, O. (2020). Efficient suboxide sources in oxide molecular beam epitaxy using mixed metal + oxide charges: The examples of SnO and Ga₂O. APL Materials, 8(3), 031110. https://doi.org/10.1063/1.5134444
    Galazka, Z., Schewski, R., Irmscher, K., Drozdowski, W., Witkowski, M. E., Makowski, M., Wojtowicz, A. J., Hanke, I. M., Pietsch, M., Schulz, T., Klimm, D., Ganschow, S., Dittmar, A., Fiedler, A., Schroeder, T., & Bickermann, M. (2020). Bulk β-Ga₂O₃ single crystals doped with Ce, Ce+Si, Ce+Al, and Ce+Al+Si for detection of nuclear radiation. Journal of Alloys and Compounds, 818, 152842. https://doi.org/10.1016/j.jallcom.2019.152842
    Klimm, D., Guguschev, C., Ganschow, S., Bickermann, M., & Schlom, D. G. (2020). REScO₃ Substrates—Purveyors of Strain Engineering. Crystal Research and Technology, 55(2), 1900111. https://doi.org/10.1002/crat.201900111
    Ramsteiner, M., Feldl, J., & Galazka, Z. (2020). Signatures of free carriers in Raman spectra of cubic In₂O₃. Semiconductor Science and Technology, 35(1), 015017. https://doi.org/10.1088/1361-6641/ab5615
    Galazka, Z., Irmscher, K., Schewski, R., Hanke, I. M., Pietsch, M., Ganschow, S., Klimm, D., Dittmar, A., Fiedler, A., Schroeder, T., & Bickermann, M. (2020). Czochralski-grown bulk β-Ga₂O₃ single crystals doped with mono-, di-, tri-, and tetravalent ions. Journal of Crystal Growth, 529, 125297. https://doi.org/10.1016/j.jcrysgro.2019.125297
    Budde, M., Remmele, T., Tschammer, C., Feldl, J., Franz, P., Lähnemann, J., Cheng, Z., Hanke, M., Ramsteiner, M., Albrecht, M., & Bierwagen, O. (2020). Plasma-assisted molecular beam epitaxy of NiO on GaN(00.1). Journal of Applied Physics, 127(1), 015306. https://doi.org/10.1063/1.5129881
    Mazzolini, P., Falkenstein, A., Wouters, C., Schewski, R., Markurt, T., Galazka, Z., Martin, M., Albrecht, M., & Bierwagen, O. (2020). Substrate-orientation dependence of β-Ga₂O₃ (100), (010), (001), and (2¯01) homoepitaxy by indium-mediated metal-exchange catalyzed molecular beam epitaxy (MEXCAT-MBE). APL Materials, 8(1), 011107. https://doi.org/10.1063/1.5135772

    GraFOx Publications 2019

    Golz, C., Galazka, Z., Lähnemann, J., Hortelano, V., Hatami, F., Masselink, W. T., & Bierwagen, O. (2019). Electrical conductivity tensor of β-Ga₂O₃ analyzed by van der Pauw measurements: Inherent anisotropy, off-Diagonal element, and the impact of grain boundaries. Physical Review Materials, 3(12), 124604. https://doi.org/10.1103/PhysRevMaterials.3.124604
    Guguschev, C., Klimm, D., Brützam, M., Gesing, T. M., Gogolin, M., Paik, H., Dittmar, A., Fratello, V. J., & Schlom, D. G. (2019). Single crystal growth and characterization of Ba₂ScNbO₆ – A novel substrate for BaSnO₃ films. Journal of Crystal Growth, 528, 125263. https://doi.org/10.1016/j.jcrysgro.2019.125263
    Fiedler, A., Galazka, Z., & Irmscher, K. (2019). Electroluminescence of Cr 3+ and pseudo-Stark effect in β-Ga₂O₃ Schottky barrier diodes. Journal of Applied Physics, 126(21), 213104. https://doi.org/10.1063/1.5125774
    Sutton, C., Ghiringhelli, L. M., Yamamoto, T., Lysogorskiy, Y., Blumenthal, L., Hammerschmidt, T., Golebiowski, J. R., Liu, X., Ziletti, A., & Scheffler, M. (2019). Crowd-sourcing materials-science challenges with the NOMAD 2018 Kaggle competition. Npj Computational Materials, 5(1), 111. https://doi.org/10.1038/s41524-019-0239-3
    Golz, C., Galazka, Z., Popp, A., Anooz, S. B., Wagner, G., Hatami, F., & Masselink, W. T. (2019). Deep-level noise characterization of MOVPE-grown β-Ga ₂O₃. Applied Physics Letters, 115(13), 133504. https://doi.org/10.1063/1.5098994
    Ahrling, R., Boy, J., Handwerg, M., Chiatti, O., Mitdank, R., Wagner, G., Galazka, Z., & Fischer, S. F. (2019). Transport properties and finite size effects in β-Ga₂O₃ thin films. Scientific Reports, 9(1), 13149. https://doi.org/10.1038/s41598-019-49238-2
    Vorwerk, C., Aurich, B., Cocchi, C., & Draxl, C. (2019). Bethe–Salpeter equation for absorption and scattering spectroscopy: Implementation in the exciting code. Electronic Structure, 1(3), 037001. https://doi.org/10.1088/2516-1075/ab3123
    Bin Anooz, S., Popp, A., Grüneberg, R., Wouters, C., Schewski, R., Schmidbauer, M., Albrecht, M., Fiedler, A., Ramsteiner, M., Klimm, D., Irmscher, K., Galazka, Z., & Wagner, G. (2019). Indium incorporation in homoepitaxial β-Ga₂O₃ thin films grown by metal organic vapor phase epitaxy. Journal of Applied Physics, 125(19), 195702. https://doi.org/10.1063/1.5090213
    Feneberg, M., Bläsing, J., Sekiyama, T., Ota, K., Akaiwa, K., Ichino, K., & Goldhahn, R. (2019). Anisotropic phonon properties and effective electron mass in α -Ga₂O₃. Applied Physics Letters, 114(14), 142102. https://doi.org/10.1063/1.5086731
    Hidde, J., Guguschev, C., & Klimm, D. (2019). Thermal analysis and crystal growth of doped Nb₂O₅. Journal of Crystal Growth, 509, 60–65. https://doi.org/10.1016/j.jcrysgro.2018.12.035
    Fiedler, A., Schewski, R., Galazka, Z., & Irmscher, K. (2019). Static dielectric constant of β-Ga₂O₃ perpendicular to the principal planes (100), (010), and (001). ECS Journal of Solid State Science and Technology, 8(7), Q3083–Q3085. https://doi.org/10.1149/2.0201907jss
    Schewski, R., Lion, K., Fiedler, A., Wouters, C., Popp, A., Levchenko, S. V., Schulz, T., Schmidbauer, M., Bin Anooz, S., Grüneberg, R., Galazka, Z., Wagner, G., Irmscher, K., Scheffler, M., Draxl, C., & Albrecht, M. (2019). Step-flow growth in homoepitaxy of β-Ga₂O₃ (100)—The influence of the miscut direction and faceting. APL Materials, 7(2), 022515. https://doi.org/10.1063/1.5054943
    Mazzolini, P., Vogt, P., Schewski, R., Wouters, C., Albrecht, M., & Bierwagen, O. (2019). Faceting and metal-exchange catalysis in (010) β-Ga₂O₃ thin films homoepitaxially grown by plasma-assisted molecular beam epitaxy. APL Materials, 7(2), 022511. https://doi.org/10.1063/1.5054386
    Galazka, Z., Ganschow, S., Schewski, R., Irmscher, K., Klimm, D., Kwasniewski, A., Pietsch, M., Fiedler, A., Schulze-Jonack, I., Albrecht, M., Schröder, T., & Bickermann, M. (2019). Ultra-wide bandgap, conductive, high mobility, and high quality melt-grown bulk ZnGa₂O₄ single crystals. APL Materials, 7(2), 022512. https://doi.org/10.1063/1.5053867
    Boy, J., Handwerg, M., Ahrling, R., Mitdank, R., Wagner, G., Galazka, Z., & Fischer, S. F. (2019). Temperature dependence of the Seebeck coefficient of epitaxial β-Ga₂O₃ thin films. APL Materials, 7(2), 022526. https://doi.org/10.1063/1.5084791
    Bartel, C. J., Sutton, C., Goldsmith, B. R., Ouyang, R., Musgrave, C. B., Ghiringhelli, L. M., & Scheffler, M. (2019). New tolerance factor to predict the stability of perovskite oxides and halides. Science Advances, 5(2), eaav0693. https://doi.org/10.1126/sciadv.aav0693
    Hirsch, T., Guguschev, C., Kwasniewski, A., Ganschow, S., & Klimm, D. (2019). Investigation of the Nd₂O₃ –Lu₂O₃ –Sc₂O₃ phase diagram for the preparation of perovskite-type mixed crystals NdLu₁₋ₓScₓO₃. Journal of Crystal Growth, 505, 38–43. https://doi.org/10.1016/j.jcrysgro.2018.10.003

    GraFOx Publications 2018

    Vogt, P., & Bierwagen, O. (2018). Quantitative subcompound-mediated reaction model for the molecular beam epitaxy of III-VI and IV-VI thin films: Applied to Ga₂O₃, In₂O₃, and SnO₂. Physical Review Materials, 2(12), 120401. https://doi.org/10.1103/PhysRevMaterials.2.120401
    Galazka, Z. (2018). β-Ga₂O₃ for wide-bandgap electronics and optoelectronics. Semiconductor Science and Technology, 33(11), 113001. https://doi.org/10.1088/1361-6641/aadf78
    Boschker, J., Markurt, T., Albrecht, M., & Schwarzkopf, J. (2018). Heteroepitaxial growth of T-Nb₂O₅ on SrTiO₃. Nanomaterials, 8(11), 895. https://doi.org/10.3390/nano8110895
    Cheng, Z., Hanke, M., Galazka, Z., & Trampert, A. (2018). Thermal expansion of single-crystalline β-Ga₂O₃ from RT to 1200 K studied by synchrotron-based high resolution x-Ray diffraction. Applied Physics Letters, 113(18), 182102. https://doi.org/10.1063/1.5054265
    Cheng, Z., Hanke, M., Galazka, Z., & Trampert, A. (2018). Growth mode evolution during (100)-Oriented β-Ga₂O₃ homoepitaxy. Nanotechnology, 29(39), 395705. https://doi.org/10.1088/1361-6528/aad21b
    Thielert, B., Janowitz, C., Galazka, Z., & Mulazzi, M. (2018). Theoretical and experimental investigation of the electronic properties of the wide band-gap transparent semiconductor MgGa₂O₄. Physical Review B, 97(23), 235309. https://doi.org/10.1103/PhysRevB.97.235309
    Budde, M., Tschammer, C., Franz, P., Feldl, J., Ramsteiner, M., Goldhahn, R., Feneberg, M., Barsan, N., Oprea, A., & Bierwagen, O. (2018). Structural, optical, and electrical properties of unintentionally doped NiO layers grown on MgO by plasma-assisted molecular beam epitaxy. Journal of Applied Physics, 123(19), 195301. https://doi.org/10.1063/1.5026738
    Baldini, M., Galazka, Z., & Wagner, G. (2018). Recent progress in the growth of β-Ga₂O₃ for power electronics applications. Materials Science in Semiconductor Processing, 78, 132–146. https://doi.org/10.1016/j.mssp.2017.10.040
    Feneberg, M., Nixdorf, J., Neumann, M. D., Esser, N., Artús, L., Cuscó, R., Yamaguchi, T., & Goldhahn, R. (2018). Ordinary dielectric function of corundumlike α-Ga₂O₃ from 40 meV to 20 eV. Physical Review Materials, 2(4), 044601. https://doi.org/10.1103/PhysRevMaterials.2.044601
    Guguschev, C., Hidde, J., Gesing, T. M., Gogolin, M., & Klimm, D. (2018). Czochralski growth and characterization of TbₓGd₁₋ₓ ScO₃ and TbₓDy ₁₋ₓScO₃ solid-solution single crystals. CrystEngComm, 20(20), 2868–2876. https://doi.org/10.1039/C8CE00335A
    Kokott, S., Levchenko, S. V., Rinke, P., & Scheffler, M. (2018). First-principles supercell calculations of small polarons with proper account for long-range polarization effects. New Journal of Physics, 20(3), 033023. https://doi.org/10.1088/1367-2630/aaaf44
    Hidde, J., Guguschev, C., Ganschow, S., & Klimm, D. (2018). Thermal conductivity of rare-earth scandates in comparison to other oxidic substrate crystals. Journal of Alloys and Compounds, 738, 415–421. https://doi.org/10.1016/j.jallcom.2017.12.172
    Galazka, Z., Ganschow, S., Fiedler, A., Bertram, R., Klimm, D., Irmscher, K., Schewski, R., Pietsch, M., Albrecht, M., & Bickermann, M. (2018). Doping of Czochralski-grown bulk β-Ga₂O₃ single crystals with Cr, Ce and Al. Journal of Crystal Growth, 486, 82–90. https://doi.org/10.1016/j.jcrysgro.2018.01.022
    Bierwagen, O., & Galazka, Z. (2018). The inherent transport anisotropy of rutile tin dioxide (SnO₂ ) determined by van der Pauw measurements and its consequences for applications. Applied Physics Letters, 112(9), 092105. https://doi.org/10.1063/1.5018983

    GraFOx Publications 2017

    Papadogianni, A., Kirste, L., & Bierwagen, O. (2017). Structural and electron transport properties of single-crystalline In₂O₃ films compensated by Ni acceptors. Applied Physics Letters, 111(26), 262103. https://doi.org/10.1063/1.5006421
    Vogt, P., Brandt, O., Riechert, H., Lähnemann, J., & Bierwagen, O. (2017). Metal-exchange catalysis in the growth of sesquioxides: Towards heterostructures of transparent oxide semiconductors. Physical Review Letters, 119(19), 196001. https://doi.org/10.1103/PhysRevLett.119.196001
    Fiedler, A., Schewski, R., Baldini, M., Galazka, Z., Wagner, G., Albrecht, M., & Irmscher, K. (2017). Influence of incoherent twin boundaries on the electrical properties of β-Ga₂O₃ layers homoepitaxially grown by metal-organic vapor phase epitaxy. Journal of Applied Physics, 122(16), 165701. https://doi.org/10.1063/1.4993748
    Cheng, Z., Hanke, M., Vogt, P., Bierwagen, O., & Trampert, A. (2017). Phase formation and strain relaxation of Ga₂O₃ on C-plane and a-Plane sapphire substrates as studied by synchrotron-based x-Ray diffraction. Applied Physics Letters, 111(16), 162104. https://doi.org/10.1063/1.4998804
    Baldini, M., Albrecht, M., Fiedler, A., Irmscher, K., Schewski, R., & Wagner, G. (2017). Si- and Sn-doped homoepitaxial β-Ga ₂O₃ layers grown by MOVPE on (010)-Oriented substrates. ECS Journal of Solid State Science and Technology, 6(2), Q3040–Q3044. https://doi.org/10.1149/2.0081702jss
    Galazka, Z., Uecker, R., Klimm, D., Irmscher, K., Naumann, M., Pietsch, M., Kwasniewski, A., Bertram, R., Ganschow, S., & Bickermann, M. (2017). Scaling-Up of Bulk β-Ga₂O₃ single crystals by the Czochralski method. ECS Journal of Solid State Science and Technology, 6(2), Q3007–Q3011. https://doi.org/10.1149/2.0021702jss
    Guguschev, C., Kok, D. J., Juda, U., Uecker, R., Sintonen, S., Galazka, Z., & Bickermann, M. (2017). Top-seeded solution growth of SrTiO₃ single crystals virtually free of mosaicity. Journal of Crystal Growth, 468, 305–310. https://doi.org/10.1016/j.jcrysgro.2016.10.048
    Klimm, D., Guguschev, C., Kok, D. J., Naumann, M., Ackermann, L., Rytz, D., Peltz, M., Dupré, K., Neumann, M. D., Kwasniewski, A., Schlom, D. G., & Bickermann, M. (2017). Crystal growth and characterization of the pyrochlore Tb₂Ti ₂O₇. CrystEngComm, 19(28), 3908–3914. https://doi.org/10.1039/C7CE00942A
    Schmidbauer, M., Hanke, M., Kwasniewski, A., Braun, D., von Helden, L., Feldt, C., Leake, S. J., & Schwarzkopf, J. (2017). Scanning X-ray nanodiffraction from ferroelectric domains in strained K 0.75 Na 0.25 NbO₃ epitaxial films grown on (110) TbScO₃. Journal of Applied Crystallography, 50(2), 519–524. https://doi.org/10.1107/S1600576717000905
    Vorwerk, C., Cocchi, C., & Draxl, C. (2017). Addressing electron-hole correlation in core excitations of solids: An all-electron many-body approach from first principles. Physical Review B, 95(15), 155121. https://doi.org/10.1103/PhysRevB.95.155121
    Guguschev, C., Philippen, J., Kok, D. J., Markurt, T., Klimm, D., Hinrichs, K., Uecker, R., Bertram, R., & Bickermann, M. (2017). Czochralski growth and characterization of cerium doped calcium scandate. CrystEngComm, 19(18), 2553–2560. https://doi.org/10.1039/C7CE00445A
    Galazka, Z., Uecker, R., Irmscher, K., Klimm, D., Bertram, R., Kwasniewski, A., Naumann, M., Schewski, R., Pietsch, M., Juda, U., Fiedler, A., Albrecht, M., Ganschow, S., Markurt, T., Guguschev, C., & Bickermann, M. (2017). Melt growth and properties of bulk BaSnO₃ single crystals. Journal of Physics: Condensed Matter, 29(7), 075701. https://doi.org/10.1088/1361-648X/aa50e2
    Uecker, R., Bertram, R., Brützam, M., Galazka, Z., Gesing, T. M., Guguschev, C., Klimm, D., Klupsch, M., Kwasniewski, A., & Schlom, D. G. (2017). Large-lattice-parameter perovskite single-crystal substrates. Journal of Crystal Growth, 457, 137–142. https://doi.org/10.1016/j.jcrysgro.2016.03.014
    Miller, W., Böttcher, K., Galazka, Z., & Schreuer, J. (2017). Numerical Modelling of the Czochralski Growth of β-Ga₂O₃. Crystals, 7(1), 26. https://doi.org/10.3390/cryst7010026

    GraFOx Publications 2016

    Schewski, R., Baldini, M., Irmscher, K., Fiedler, A., Markurt, T., Neuschulz, B., Remmele, T., Schulz, T., Wagner, G., Galazka, Z., & Albrecht, M. (2016). Evolution of planar defects during homoepitaxial growth of β-Ga₂O₃ layers on (100) substrates—A quantitative model. Journal of Applied Physics, 120(22), 225308. https://doi.org/10.1063/1.4971957
    Handwerg, M., Mitdank, R., Galazka, Z., & Fischer, S. F. (2016). Temperature-dependent thermal conductivity and diffusivity of a Mg-doped insulating β-GaO₃ single crystal along [100], [010] and [001]. Semiconductor Science and Technology, 31(12), 125006. https://doi.org/10.1088/0268-1242/31/12/125006
    Cocchi, C., Zschiesche, H., Nabok, D., Mogilatenko, A., Albrecht, M., Galazka, Z., Kirmse, H., Draxl, C., & Koch, C. T. (2016). Atomic signatures of local environment from core-level spectroscopy in β-Ga₂O₃. Physical Review B, 94(7), 075147. https://doi.org/10.1103/PhysRevB.94.075147
    Vogt, P., & Bierwagen, O. (2016). Kinetics versus thermodynamics of the metal incorporation in molecular beam epitaxy of (InxGa1-x)₂O₃. APL Materials, 4(8), 086112. https://doi.org/10.1063/1.4961513
    Vogt, P., & Bierwagen, O. (2016). Comparison of the growth kinetics of In₂O₃ and Ga₂O₃ and their suboxide desorption during plasma-assisted molecular beam epitaxy. Applied Physics Letters, 109(6), 062103. https://doi.org/10.1063/1.4960633