Artículos de revistas
Phase Stability, Chemical Bonds, And Gap Bowing Of Inx Ga1-x N Alloys: Comparison Between Cubic And Wurtzite Structures
Registro en:
Physical Review B - Condensed Matter And Materials Physics. , v. 74, n. 4, p. - , 2006.
10980121
10.1103/PhysRevB.74.045215
2-s2.0-33746506034
Autor
Caetano C.
Teles L.K.
Marques M.
Dal Pino Jr. A.
Ferreira L.G.
Institución
Resumen
Thermodynamic, structural, and electronic properties of wurtzite Inx Ga1-x N alloys are studied by combining first-principles total energy calculations with the generalized quasichemical approach, and compared to previous results for the zinc-blende structure. Results for bond-lengths, second-nearest- neighbors distances, and bowing parameter are presented. We observed that the wurtzite results are not significantly different from the ones obtained previously for the zinc-blende structure. The calculated phase diagram of the alloy shows a broad and asymmetric miscibility gap as in the zinc-blende case, with a similar range for the growth temperatures, although with a higher critical temperature. We found a value of 1.44 eV for the gap bowing parameter giving support to the recent smaller band gap bowing findings. We emphasize that other theoretical results may suffer from incomplete sets of atomic configurations to properly describe the alloy properties, and experimental findings. Moreover one must take into account a broad composition range in order to obtain reliable results. © 2006 The American Physical Society. 74 4
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