Magnetic Order in the Double Exchange Model in Infinite Dimensions : Condensed Matter: Electronic Properties, etc.
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概要
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We studied magnetic properties of the double exchange (DE) model with S = 1/2 localized spins at T = 0, using exact diagonalization in the framework of the dynamical mean field theory. Obtained phase diagram contains ferromagnetic, antiferromagnetic and paramagnetic phases. Comparing the phase diagram with that of the DE model with classical localized spins, we found that the quantum fluctuations of localized spins partly destabilize the ferromagnetism and expand the paramagnetic phase region. We found that phase separations occur between the antiferromagnetic and paramagnetic phases as well as the paramagnetic and ferromagnetic ones.
- 社団法人日本物理学会の論文
- 2000-06-15
著者
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桃井 勉
独立行政法人理化学研究所
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KUBO Kenn
Department of Physics, Aoyama Gakuin University
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久保 健
青山学院大 理工
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Kubo Kenn
Department Of Physics And Mathematics Aoyama Gakuin University
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Kubo K
Department Of Pure And Applied Sciences University Of Tokyo
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NAGAI Kentaro
Institute of Physics, University of Tsukuba
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MOMOI Tsutomu
Institute of Physics, University of Tsukuba
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Nagai Kentaro
Institute Of Physics University Of Tsukuba
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Tsutomu Momoi
Condensed Matter Theory Laboratory Riken
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Momoi Tsutomu
Institute Of Physics University Of Tsuknba
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Momoi Tsutomu
Condensed Matter Theory Laboratory Riken
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KUBO Kenn
Department of Physics, Aoyama-Gakuin University
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KUBO Kenn
Department of Physics and Astronomy,Michigan State University
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