Partial Ferromagnetism in the Hubbard Chain with Next-Nearest-Neighbor Hopping (Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
- 論文の詳細を見る
We study the one-dimerisional Hubbard model with next-nearest-neighbor hopping by means of the numerical diagonalization for finite-size clusters. It is found that the ground state is evidently partially spin-polarized in a wide region of intermediate values of on-site Coulomb repulsion, which provides the first example as a minimal model without orbital degeneracy. Analysis of correlation functions makes it clear that the partially spin-polarized states form a spin polaron. Polaron's size grows with the increasing interaction.
- 社団法人日本物理学会の論文
- 2003-05-15
著者
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坂本 博康
Graduate School Of Material Science University Of Hyogo
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NAKANO Hiroki
Graduate School of Material Science, University of Hyogo
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Takahashi Yoshinori
Graduate School of Engineering, Osaka University
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Inoue M
Department Of Physics Kagoshima University
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Nakano Hiroki
Department Of Immunology And Medical Zoology Hyogo College Of Medicine
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Takahashi Y
Department Of Physics Yamagata University
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Nakano Hiroki
Graduate School And Faculty Of Science Himeji Institute Of Technology
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Takahashi Yoshinori
Graduate School Of Engineering Osaka University
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Takahashi Yoshinori
Graduate School And Faculty Of Science Himeji Institute Of Technology
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Takahashi Yoshinori
Graduate School and Faculty of Science, Himeji Institute of Technology
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