$d$-Wave Spin Density Wave Phase in the Attractive Hubbard Model with Spin Polarization
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概要
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We investigate the possibility of an unconventional spin density wave (SDW) in the attractive Hubbard model with finite spin polarization. We show that pairing and density fluctuations induce a transverse $d$-wave SDW near the half-filling. This novel SDW is related to the $d$-wave superfluidity induced by antiferromagnetic spin fluctuations, in the sense that they are connected with each other through Shiba’s attraction–repulsion transformation. Our results predict the $d$-wave SDW in real systems, such as cold Fermi atom gases with a population imbalance and compounds involving valence skipper elements.
- 2009-07-15
著者
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Miyake Kazumasa
Department Of Internal Medicine Division Of Gastroenterology Nippon Medical School
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Ohashi Yoji
Faculty Of Science And Technology Keio University
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Tamaki Hiromasa
Department Of Materials Engineering Science Graduate School Of Engineering Science Osaka University
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Tamaki Hiromasa
Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531
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Ohashi Yoji
Faculty of Science and Technology, Keio University, Yokohama 223-8522
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