期刊
SCRIPTA MATERIALIA
卷 65, 期 6, 页码 465-468出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.05.028
关键词
GaN; Ga2O3; Interface; Polarity; First-principles calculations
类别
资金
- National Science Council [NSC98-2112-M-005-005-MY3]
- Ministry of Economic Affairs, Taiwan, Republic of China [99-EC-17-A-07-S1-158]
- Ministry of Education, Taiwan, Republic of China
We present first-principle calculations on the heterojunction between a wurtzite GaN(0 0 0 1) film and a monoclinic beta-Ga2O3(1 0 0) substrate. The relative stability of different models of the GaN(0 0 0 1)/Ga2O3(1 0 0) interface was investigated and the most favorable interface consists of threefold- and sixfold-coordinated Ga. This interface structure gives rise to Ga-polarity in the GaN(0 0 0 1) epitaxial film. A detailed analysis of the electronic structure indicates that undistorted bonding at the interface stabilizes this structure between a wurtzite GaN(0 0 0 1) and a monoclinic beta-Ga2O3(1 0 0). (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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