Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9567313 | Applied Surface Science | 2005 | 4 Pages |
Abstract
We study the feasibility of our empirical potential to dislocation formation and its contribution to structural stability in GaNxAs1âx. The feasibility is exemplified by the calculations of the dislocation core energy and core radius for various dislocation core structures in wurtzite structured GaN. Moreover, we carry out theoretical analyses of the structural stability for GaNxAs1âx with dislocation whose core structure is described by five- and seven-coordinated channels (5/7 core) over the entire concentration range. The GaNxAs1âx changes its structure from zinc blende to wurtzite at the concentration for phase transition xc = 0.3 with dislocation and xc = 0.4 without dislocation. This is because the 5/7 core favors the wurtzite structured GaNxAs1âx with lower core energy than that in zinc blende structured GaNxAs1âx.
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Authors
Keiichi Kawamoto, Takashi Suda, Toru Akiyama, Kohji Nakamura, Tomonori Ito,