Radius-dependent polarization anisotropy in semiconductor nanowires

A. V. Maslov, C. Z. Ning

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Polarization anisotropy in semiconductor nanowires is studied using the standard eight-band k·p theory. We show that the anisotropy ratio ranges from giant (∼90%) to moderate (∼60%) for the nanowire radius between 3 and 10 nm. Our result resolves an apparent contradiction between a recent tight-binding study [M. P. Persson and H. Q. Xu, Phys. Rev. B 70, 161310(R) (2004)], which predicts 100% anisotropy, and an earlier k·p study [P. C. Sercel and K. J. Vahala, Phys. Rev. B 44, 5681 (1991)], which predicts 60% anisotropy independent of radius. We show that with proper inclusion of band mixing, the k·p theory agrees well with the tight-binding study on anisotropy.

Original languageEnglish (US)
Article number161310
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number16
DOIs
StatePublished - Oct 15 2005
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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