Drude Weight of the Two-Dimensional Hubbard Model : Reexamination of Finite-Size Effect in Exact Diagonalization Study(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
スポンサーリンク
概要
- 論文の詳細を見る
The Drude weight of the Hubbard model on the two-dimensional square lattice is studied by the exact diagonalizations applied to clusters up to 20 sites. We carefully examine finite-size effects by consideration of the appropriate shapes of clusters and the appropriate boundary condition beyond the limitation of employing only the simple periodic boundary condition. We successfully capture the behavior of the Drude weight that is proportional to the squared hole doping concentration. Our present result gives a consistent understanding of the transition between the Mott insulator and doped metals. We also find, in the frequency dependence of the optical conductivity, that the mid-gap incoherent part emerges more quickly than the coherent part and rather insensitive to the doping concentration in accordance with the scaling of the Drude weight.
- 社団法人日本物理学会の論文
- 2007-03-15
著者
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IMADA Masatoshi
Department of Applied Physics, University of Tokyo
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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 Masayoshi
Department Of Operative Dentistry Osaka Dental University
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Inoue Masataka
Osaka Dental Univ. Osaka Jpn
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Inoue Masataka
Department Of Operative Dentistry Osaka Dental University
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Inoue M
Department Of Physics Kagoshima University
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Imada Masatoshi
Department Of Applied Physics University Of Tokyo
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Nakano Hiroki
Department Of Immunology And Medical Zoology Hyogo College Of Medicine
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Nakano Hiroki
Graduate School Of Material Science University Of Hyogo
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坂本 博康
九州芸術工科大学画像設計学科
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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 of Material Science, University of Hyogo
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