Bowing parameters for zinc-blende Al{sub 1{minus}{ital x}}Ga{sub {ital x}}N and Ga{sub 1{minus}{ital x}}In{sub {ital x}}N
- Sandia National Laboratories, Albuquerque, New Mexico 87185-1415 (United States)
First-principles calculations have been used to determine bowing parameters for disordered zinc-blende Al{sub 1{minus}{ital x}}Ga{sub {ital x}}N and Ga{sub 1{minus}{ital x}}In{sub {ital x}}N. The direct transition at {Gamma} is found to bow downward for both materials with parameters +0.53 and +1.02 eV, respectively, while the {Gamma}-to-{ital X} transition bows upward for Al{sub 1{minus}{ital x}}Ga{sub {ital x}}N (parameter {minus}0.10 eV) and downward for Ga{sub 1{minus}{ital x}}In{sub {ital x}}N (parameter +0.38 eV). The similarity of the calculated bulk zinc-blende and wurtzite {Gamma}-point transitions also allows estimates to be made of the energy gap versus composition for wurtzite alloys. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- Research Organization:
- Sandia National Laboratory
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 64322
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 22 Vol. 66; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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