First-principles calculation for bowing parameter of wurtzite Al xGa1-xN

B. T. Liou, S. H. Yen, Y. K. Kuo

研究成果: Article同行評審

21 引文 斯高帕斯(Scopus)

摘要

Numerical calculation based on first-principles is applied to study the structural characteristics and the band-energy properties of wurtzite Al xGa1-xN. The lattice constants obtained from the equilibrium energy are larger than those obtained from the Vegard's law. The deviation parameter is 0.040±0.005 Å for the a lattice constant and 0.125±0.009 Å for the c lattice constant. The band gap energy is overestimated with the Vegard's law. The bowing parameter of direct (indirect) band gap energy of 0.752±0.069 eV (0.889±0.057 eV) is obtained with the equilibrium lattice constants, and 0.352±0.046 eV (0.271±0.056 eV) is obtained with the lattice constants derived from the Vegard's law.

原文English
頁(從 - 到)1459-1463
頁數5
期刊Applied Physics A: Materials Science and Processing
81
發行號7
DOIs
出版狀態Published - 2005 十一月 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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