Dynamical Cluster Approximation in Disordered Systems with Magnetic Impurities(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

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概要

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• We present a theoretical method to study diluted magnetic semiconductors, beyond the single-site approximation, extending the dynamical cluster approximation (DCA) By the method, we can consider the nonlocal correlations due to disorder and discuss effects of the direct exchange interaction between magnetic impurities on the properties of the itinerant carriers. We apply the method to a three-dimensional cubic lattice system with random localized spins. We show that the strong antiferromagnetic superexchange interaction between nearest-neighbor sites suppresses the polarization of the carrier spins.

• 2004-12-15

著者

• Dino W

  Osaka Univ. Osaka

• NAKANISHI Hiroshi

  Department of Precision Science and Technology and Applied Physics, Osaka University

• Dino W

  Department Of Physics Osaka University

• Dino Wilson

  Department Of Applied Physics Osaka University

• Kasai Hideaki

  Department Of Applied Physics Osaka University

• Matsunaka Daisuke

  Department Of Applied Physics Osaka University

• Dino W

  Department Of Applied Physics Osaka University

• Kasai Hideaki

  Department Of Applied Physics Faculty Of Engineering Osaka University

• Kasai Haruo

  Department Of Electronics Chiba University

• Nakanishi Hiroshi

  Department Of Electronic Engineering Faculty Of Engineering Yamanashi University:(present Address) Sanken Electric Co. Ltd.

• Nakanishi Hiroshi

  Department Of Biological Science And Technology Tokyo University Of Science

• Dino Wilson

  Department of Applied Physics, Osaka University

• Nakanishi Hiroshi

  Department of Applied Physics, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan

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