Quantum monte carlo study of anderson magnetic impurities in semiconductors

N. Bulut, Y. Tomoda, K. Tanikawa, S. Takahashi, S. Maekawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We use quantum Monte Carlo simulations to study the electronic properties of Anderson magnetic impurities in a semiconductor host. We find that in a semiconductor the magnetic impurities exhibit ferromagnetic correlations, which can have a much longer range than in a metallic host. In particular, the range is longest when the Fermi level is located between the top of the valence band and the impurity bound state. We study the dependence of the ferromagnetic correlations on the parameters of the Anderson model, and the dimensionality and band structure of the host material. Using the tight-binding approximation for calculating the host band structure and the impurity–host hybridization, we obtain an impurity bound state, which is located at ≈100 meV above the top of the valence band, which is in agreement with the transport measurements on GaAs with dilute Mn impurities.

Original languageEnglish
Title of host publicationAdvances in Nanoscale Magnetism - Proceedings of the International Conference on Nanoscale Magnetism, ICNM 2007
EditorsFaik Mikailov, Bekir Aktas
PublisherSpringer Science and Business Media, LLC
Pages67-87
Number of pages21
ISBN (Print)9783540698814
DOIs
Publication statusPublished - 2009 Jan 1
EventInternational Conference on Nanoscale Magnetism, ICNM 2007 - Istanbul, Turkey
Duration: 2007 Jun 252007 Jun 29

Publication series

NameSpringer Proceedings in Physics
Volume122
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941

Other

OtherInternational Conference on Nanoscale Magnetism, ICNM 2007
CountryTurkey
CityIstanbul
Period07/6/2507/6/29

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Bulut, N., Tomoda, Y., Tanikawa, K., Takahashi, S., & Maekawa, S. (2009). Quantum monte carlo study of anderson magnetic impurities in semiconductors. In F. Mikailov, & B. Aktas (Eds.), Advances in Nanoscale Magnetism - Proceedings of the International Conference on Nanoscale Magnetism, ICNM 2007 (pp. 67-87). (Springer Proceedings in Physics; Vol. 122). Springer Science and Business Media, LLC. https://doi.org/10.1007/978-3-540-69882-1_4