@article{f816b639cd1d4699a8f1a8d5f94ad25d,
title = "H trapping at the metastable cation vacancy in α -Ga2O3and α -Al2O3",
abstract = "α-Ga2O3 has the corundum structure analogous to that of α-Al2O3. The bandgap energy of α-Ga2O3 is 5.3 eV and is greater than that of β-Ga2O3, making the α-phase attractive for devices that benefit from its wider bandgap. The O-H and O-D centers produced by the implantation of H+ and D+ into α-Ga2O3 have been studied by infrared spectroscopy and complementary theory. An O-H line at 3269 cm-1 is assigned to H complexed with a Ga vacancy (VGa), similar to the case of H trapped by an Al vacancy (VAl) in α-Al2O3. The isolated VGa and VAl defects in α-Ga2O3 and α-Al2O3 are found by theory to have a {"}shifted{"}vacancy-interstitial-vacancy equilibrium configuration, similar to VGa in β-Ga2O3, which also has shifted structures. However, the addition of H causes the complex with H trapped at an unshifted vacancy to have the lowest energy in both α-Ga2O3 and α-Al2O3.",
author = "Andrew Venzie and Amanda Portoff and Michael Stavola and Fowler, {W. Beall} and Jihyun Kim and Jeon, {Dae Woo} and Park, {Ji Hyeon} and Pearton, {Stephen J.}",
note = "Funding Information: The work at Lehigh University was supported by NSF Grant No. DMR 1901563 (James Edgar). The work in South Korea was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (Nos. 2018R1D1A1B07048429 and 2020M3H4A3081799). The work at UF was performed as part of Interaction of Ionizing Radiation with Matter University Research Alliance (IIRM-URA), sponsored by the Department of the Defense, Defense Threat Reduction Agency under Award No. HDTRA1-20-2-0002 (Jacob Calkins). The content of the information does not necessarily reflect the position or the policy of the federal government, and no official endorsement should be inferred. The work at UF was also supported by NSF No. DMR 1856662 (James Edgar). Portions of this research were conducted on Research Computing resources provided by Lehigh University supported by the NSF Award No. 2019035. Publisher Copyright: {\textcopyright} 2022 Author(s).",
year = "2022",
month = may,
day = "9",
doi = "10.1063/5.0094707",
language = "English",
volume = "120",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "19",
}