Anisotropic shape of self-assembled InAs quantum dots: Refraction effect on spot shape of reflection high-energy electron diffraction

Takashi Hanada, Bon Heun Koo, Hirofumi Totsuka, Takafumi Yao

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

A significant role of refraction effect on reflection high-energy electron diffraction (RHEED) from nanostructures is demonstrated. It was found that the chevron-shape spots in RHEED patterns from self-assembled InAs/GaAs(001) and InAs/InAlAs/InP(001) quantum dots at (formula presented) azimuth are well reproduced by kinematical calculations taking into account the refraction of electron beam at the curved surfaces of the dots. The dots must have (formula presented) cross sections steeper than (110) cross sections and consequently extend along (formula presented) since the refraction effects, considerable only at glancing incidence and departure, are invisible at [110] azimuth.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume64
Issue number16
DOIs
Publication statusPublished - 2001 Jan 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Anisotropic shape of self-assembled InAs quantum dots: Refraction effect on spot shape of reflection high-energy electron diffraction'. Together they form a unique fingerprint.

Cite this