Mean-field approach to disorder effects on ferromagnetism in Ga1-xMnxAs

Mona Berciu, R. N. Bhatt

Research output: Contribution to journalConference articlepeer-review

14 Scopus citations

Abstract

Using a numerical mean field treatment, we examine the onset of ferromagnetism and the nature of the ferromagnetic phase in Ga1-xMnxAs for charge carrier densities in the vicinity of the metal-insulator transition. Our approach, which explicitly takes into account the positional disorder of the Mn ions, shows that the ferromagnetic transition temperature is significantly enhanced by the disorder. Concurrently, a very unusual temperature dependence of the magnetization is obtained in the ferromagnetic phase.

Original languageEnglish (US)
Pages (from-to)815-817
Number of pages3
JournalPhysica B: Condensed Matter
Volume312-313
DOIs
StatePublished - Mar 1 2002
EventInternational Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States
Duration: Aug 6 2002Aug 6 2002

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Keywords

  • Diluted magnetic semiconductors
  • Ferromagnetism

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