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Edvin Lundgren. Portrait.

Edvin Lundgren

Professor

Edvin Lundgren. Portrait.

Direct observation of atomic scale surface relaxation in ortho twin structures in GaAs by XSTM

Author

  • J Bolinsson
  • Lassana Ouattara
  • W. A. Hofer
  • Niklas Sköld
  • Edvin Lundgren
  • Anders Gustafsson
  • Anders Mikkelsen

Summary, in English

We have studied the (110) GaAs surface of a structure containing ortho twins by cross-sectional scanning tunnelling microscopy and we have compared the experimental results with ab initio density functional theory calculations and STM simulations. Both experimentally and theoretically we find that the surface of different twin crystallites are significantly displaced with respect to each other, parallel to the twin boundary. This result is explained by a surface relaxation of the atoms in the (110) GaAs surface and the difference between the atomic configuration of the ortho twins.

Department/s

  • Synchrotron Radiation Research
  • Solid State Physics

Publishing year

2009

Language

English

Publication/Series

Journal of Physics: Condensed Matter

Volume

21

Issue

5

Document type

Journal article

Publisher

IOP Publishing

Topic

  • Condensed Matter Physics (including Material Physics, Nano Physics)
  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1361-648X