Effect of alloy fluctuations on the local polarization in nitride nanostructures

Miguel A. Caro*, Stefan Schulz, Eoin P. O'Reilly

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

We present a classical dipole model, in combination with first-principles calculations, to study the local polarization, as well as the polarization potential, in InGaN alloys. Our results are in excellent agreement with previous ab initio calculations in the macroscopic limit and, in addition, offer an insight into the microscopic origin of the previous results, in particular the strong relation between internal strain and the upward bowing in the spontaneous polarization of InGaN. This model can be generalized to any piezoelectric material, and in particular to AlInN and AlGaN alloys.

Original languageEnglish
Pages (from-to)526-530
Number of pages5
JournalPHYSICA STATUS SOLIDI B: BASIC SOLID STATE PHYSICS
Volume249
Issue number3
DOIs
Publication statusPublished - Mar 2012
MoE publication typeA1 Journal article-refereed

Keywords

  • Built-in field
  • InGaN
  • Local polarization
  • Nitrides

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