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

Bo Ting Liou, Yen Kuang Kuo

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

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
Volume106
Issue number4
DOIs
Publication statusPublished - 2012 Mar 1

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Energy gap
Bending (forming)
Tensile strain

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

Cite this

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title = "Effect of biaxial strain on the band gap of wurtzite Al x Ga 1-x N",
abstract = "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.",
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Effect of biaxial strain on the band gap of wurtzite Al x Ga 1-x N. / Liou, Bo Ting; Kuo, Yen Kuang.

In: Applied Physics A: Materials Science and Processing, Vol. 106, No. 4, 01.03.2012, p. 1013-1016.

Research output: Contribution to journalArticle

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AU - Liou, Bo Ting

AU - Kuo, Yen Kuang

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AB - 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.

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