First-principles calculation for misfit dislocations in InAs/GaAs(110) heteroepitaxy

Norihisa Oyama, Eiji Ohta, Kyozaburo Takeda, Kenji Shiraishi, Hiroshi Yamaguchi

Research output: Contribution to journalConference article

10 Citations (Scopus)

Abstract

The misfit dislocation core structures in InAs/GaAs(110) heterostructures were calculated for InAs thicknesses of 2 and 4 ML using first-principles calculations. Dislocation cores with asymmetric five-fold coordinated In atoms were formed at the InAs/GaAs interface. This core structure is maintained even if the thickness of InAs epilayer increases. We also calculated for the GaAs/InAs(110) heterostructure and the core has a different structure at the very initial stage of heteroepitaxy.

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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