Metal-Insulator Transition in Optical Lattice System with Site-Dependent Interactions

被引：8
作者：
Saitou, T. [1 ]
Koga, A. [1 ]
Yamamoto, A. [2 ]
机构：
[1] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan
[2] RIKEN, Adv Inst Computat Sci, Chuo Ku, Kobe, Hyogo 6500047, Japan
来源：
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2013年 / 26卷 / 05期
关键词：
Two-site dynamical mean-field theory; Mott transition; Site-dependent interaction; MEAN-FIELD THEORY; HUBBARD-MODEL; INFINITE DIMENSIONS; MOTT INSULATOR; FERMIONS; ATOMS;
D O I：
10.1007/s10948-012-2064-5
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigate the half-filled Hubbard model with spatially alternating interactions by means of the two-site dynamical mean-field theory. It is found that a single Mott transition occurs when two kinds of interactions are increased. This implies that the different interactions are essentially irrelevant at the critical point. The nature of the Mott states is also addressed.
引用
收藏
页码：1771 / 1774
页数：4
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  • [1] OBSERVATION OF BOSE-EINSTEIN CONDENSATION IN A DILUTE ATOMIC VAPOR
    ANDERSON, MH
    ENSHER, JR
    MATTHEWS, MR
    WIEMAN, CE
    CORNELL, EA
    [J]. SCIENCE, 1995, 269 (5221) : 198 - 201
  • [2] Linearized dynamical mean-field theory for the Mott-Hubbard transition
    Bulla, R
    Potthoff, M
    [J]. EUROPEAN PHYSICAL JOURNAL B, 2000, 13 (02) : 257 - 264
  • [3] Zero temperature metal-insulator transition in the infinite-dimensional Hubbard model
    Bulla, R
    [J]. PHYSICAL REVIEW LETTERS, 1999, 83 (01) : 136 - 139
  • [4] First-order pairing transition and single-particle spectral function in the attractive Hubbard model
    Capone, M
    Castellani, C
    Grilli, M
    [J]. PHYSICAL REVIEW LETTERS, 2002, 88 (12) : 4 - 126403
  • [5] Dynamical mean field theory of the antiferromagnetic metal to antiferromagnetic insulator transition
    Chitra, R
    Kotliar, G
    [J]. PHYSICAL REVIEW LETTERS, 1999, 83 (12) : 2386 - 2389
  • [6] Dynamical mean-field theory of strongly correlated fermion systems and the limit of infinite dimensions
    Georges, A
    Kotliar, G
    Krauth, W
    Rozenberg, MJ
    [J]. REVIEWS OF MODERN PHYSICS, 1996, 68 (01) : 13 - 125
  • [7] Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
    Greiner, M
    Mandel, O
    Esslinger, T
    Hänsch, TW
    Bloch, I
    [J]. NATURE, 2002, 415 (6867) : 39 - 44
  • [8] Metal-insulator transition in the two-orbital hubbard model at fractional band fillings: Self-energy functional approach
    Inaba, Kensuke
    Koga, Akihisa
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2007, 76 (09)
  • [9] A Mott insulator of fermionic atoms in an optical lattice
    Joerdens, Robert
    Strohmaier, Niels
    Guenther, Kenneth
    Moritz, Henning
    Esslinger, Tilman
    [J]. NATURE, 2008, 455 (7210) : 204 - U34
  • [10] Orbital-selective Mott transitions in the degenerate Hubbard model
    Koga, A
    Kawakami, N
    Rice, TM
    Sigrist, M
    [J]. PHYSICAL REVIEW LETTERS, 2004, 92 (21) : 216402 - 1
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