Effect of biaxial strain on the band gap of wurtzite Al x Ga 1-x N

Bo Ting Liou, Yen Kuang Kuo

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3 Citations (Scopus)


First-principles calculations are applied to investigate the effect of biaxial strain on the band gap of wurtzite Al x Ga 1-x N. The band gap and band gap bowing parameter increase with compressive strain and decrease with tensile strain. The strain-induced changes in the band gap of Al x Ga 1-x N are linear in the strain range of about -1% to 1% while the linearity is invalid out of the range. The linear coefficient B(x), characterizing the relationship between the band gap and the biaxial stress, with a quadratic form is obtained. The value of the band gap bowing parameter decreases from 1.0 eV for -2% strain to 0.91 eV for unstrained and to 0.67 eV for 2% strain.

Original languageEnglish
Pages (from-to)1013-1016
Number of pages4
JournalApplied Physics A: Materials Science and Processing
Issue number4
Publication statusPublished - 2012 Mar 1


All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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