Spin waves in disordered III-V diluted magnetic semiconductors by a modified RPA approach

Mona Berciu, R. N. Bhatt

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

We propose a scheme for numerically computing collective-mode spectra for large-size systems, using a reformulation of the random-phase approximation. In this study, we apply this method to investigate the spectrum and nature of the spin-waves of a (III,Mn)V diluted magnetic semiconductor. We use an impurity band picture to describe the interaction of the charge carriers with the local Mn spins. The spin-wave spectrum is shown to depend sensitively on the positional disorder of the Mn atoms inside the host semiconductor. Both localized and extended spin-wave modes are found. Unusual spin and charge transport is implied.

Original languageEnglish (US)
Article number085207
Pages (from-to)852071-8520713
Number of pages7668643
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number8
DOIs
StatePublished - Aug 15 2002

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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