Structure of GaSb Digitally Doped With Mn

Abstract

Cross-sectional scanning tunneling microscopy (XSTM) and density functional theory have been used to characterize the structure of GaSb digitally doped with Mn. The Mn dopants are found in both isolated substitutional form as well as in large clusters of zinc-blende MnSb commensurate with the surrounding GaSb matrix. Theoretical calculations predict that these two forms of Mn in the digitally doped layers will have a very different appearance in XSTM images. Substitutional Mn enhances the local density of states near the surface, thus appearing higher in a filled-state image. In contrast, MnSb clusters induce substantial structural relaxation at the {110} surface, and therefore appear as localized depressed regions with negligible perturbation of the surrounding GaSb.

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Document Details

Document Type
Technical Report
Publication Date
May 31, 2005
Accession Number
ADA481205

Entities

People

  • G. I. Boishin
  • J. M. Sullivan
  • Lloyd J. Whitman

Organizations

  • Northwestern University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Atoms
  • Base Pressure
  • Bulk Materials
  • Charge Density
  • Charge Transfer
  • Crystal Lattices
  • Density Functional Theory
  • Depression
  • Energy
  • Ferromagnetic Materials
  • High Resolution
  • Materials
  • Military Research
  • Semiconductors
  • Two Dimensional
  • Wave Functions
  • Waves

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.