Hubbard chains network on corner-sharing tetrahedra:: Origin of the heavy-fermion state in LiV2O4 -: art. no. 155108

被引：38

作者：

Fujimoto, S ^{[1
]}

机构：

[1] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.65.155108

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the Hubbard chains network model defined on corner-sharing tetrahedra (the pyrochlore lattice) which is a possible microscopic model for the heavy-fermion state of LiV2O4. Based upon this model, we can explain transport, magnetic, and thermodynamic properties of LiV2O4. We calculate the spin susceptibility, and the specific-heat coefficient, exploiting the Bethe ansatz exact solution of the one-dimensional Hubbard model and Bosonization method. The results are quite consistent with experimental observations. We obtain the large specific-heat coefficient gammasimilar to222 mJ/mol K-2.

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页码：1 / 5

页数：5

相关论文

共 30 条

[1] Electronic structure of the heavy fermion metal LiV2O4 [J].

Anisimov, VI ;

Korotin, MA ;

Zölfl, M ;

Pruschke, T ;

Le Hur, K ;

Rice, TM .

PHYSICAL REVIEW LETTERS, 1999, 83 (02) :364-367

[2] ONE-PARTICLE AND 2-PARTICLE INSTABILITY OF COUPLED LUTTINGER LIQUIDS [J].

BOIES, D ;

BOURBONNAIS, C ;

TREMBLAY, AMS .

PHYSICAL REVIEW LETTERS, 1995, 74 (06) :968-971

[3] Structure and thermal expansion of LiV2O4: Correlation between structure and heavy fermion behavior [J].

Chmaissem, O ;

Jorgensen, JD ;

Kondo, S ;

Johnston, DC .

PHYSICAL REVIEW LETTERS, 1997, 79 (24) :4866-4869

[4]

EMERGY VJ, 1979, HIGHLY CONDUCTING ON

[5] Electronic structure and magnetic interactions in LiV2O4 [J].

Eyert, V ;

Höck, KH ;

Horn, S ;

Loidl, A ;

Riseborough, PS .

EUROPHYSICS LETTERS, 1999, 46 (06) :762-767

[6] CRITICAL EXPONENTS FOR THE ONE-DIMENSIONAL HUBBARD-MODEL [J].

FRAHM, H ;

KOREPIN, VE .

PHYSICAL REVIEW B, 1990, 42 (16) :10553-10565

[7] ELECTRON CORRELATION IN LOW-CARRIER-DENSITY METALS - PHOTOEMISSION-STUDY OF THE HOLE-DOPED MOTT INSULATOR LIXZN1-XV2O4 [J].

FUJIMORI, A ;

KAWAKAMI, K ;

TSUDA, N .

PHYSICAL REVIEW B, 1988, 38 (11) :7889-7892

[8] Mott transition and heavy-fermion state in the pyrochlore Hubbard model [J].

Fujimoto, S .

PHYSICAL REVIEW B, 2001, 64 (08)

[9]

FUJIWARA K, UNPUB

[10] Anomalous spin fluctuation in vanadium spinel LiV2O4 studied by 7Li-NMR [J].

Fujiwara, N ;

Yasuoka, H ;

Ueda, Y .

PHYSICAL REVIEW B, 1998, 57 (06) :3539-3542