Spatial carrier confinement in Core-Shell and multishell nanowire heterostructures

A. Nduwimana, R. N. Musin, A. M. Smith, Wang Xiao-Qian

Research output: Contribution to journalArticle

Abstract

We have derived an analytical effective-mass model and employed first-principles density functional theory to study the spatial confinement of carriers in core-shell and multishell structured semiconductor nanowires. The band offset effect is analyzed based on the subband charge density distributions, which is strongly dependent upon the strain relaxation. First-principles calculation results for spatially confined Si/Ge and GaN/GaP nanowires indicate accumulation of a Ge-core hole gas and a GaN-core electron gas, respectively, in agreement with experimental observations.

Original languageEnglish (US)
Pages (from-to)3341-3344
Number of pages4
JournalNano letters
Volume8
Issue number10
DOIs
StatePublished - Oct 1 2008
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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