Monte Carlo simulations of doped, diluted magnetic semiconductors - A system with two length scales

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Abstract

We describe a Monte Carlo simulation study of the magnetic phase diagram of diluted magnetic semiconductors doped with shallow impurities in the low concentration regime. We show that because of a wide distribution of interaction strengths, the system exhibits strong quantum effects in the magnetically ordered phase. A discrete spin model, found to closely approximate the quantum system, shows long relaxation times, and the need for specialized cluster algorithms for updating spin configurations. Results for a representative system are presented.

Original languageEnglish (US)
Pages (from-to)1459-1470
Number of pages12
JournalInternational Journal of Modern Physics C
Volume10
Issue number8
DOIs
StatePublished - Jan 1 1999

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Mathematical Physics
  • Physics and Astronomy(all)
  • Computer Science Applications
  • Computational Theory and Mathematics

Keywords

  • Cluster Algorithm
  • Diluted Magnetic Semiconductors
  • Monte Carlo Simulation
  • Phase Transition
  • Shallow Impurity

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