Anomalous temperature dependence of the single-particle spectrum in the organic conductor TTF-TCNQ

被引：10

作者：

Bulut, N. ^{[1
]}

Matsueda, H.

Tohyama, T.

Maekawa, S.

机构：

[1] Tohoku Univ, Mat Res Inst, Sendai, Miyagi 9808577, Japan

[2] Japan Sci & Technol Agcy, CREST, Kawagoe, Saitama 3320012, Japan

[3] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

来源：

PHYSICAL REVIEW B | 2006年 / 74卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.74.113106

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The angle-resolved photoemission spectrum of the organic conductor TTF-TCNQ exhibits an unusual transfer of spectral weight over a wide energy range for temperatures 60 K < T < 260 K. In order to investigate the origin of this finding, here we report numerical results on the single-particle spectral weight A(k,omega) for the one-dimensional (1D) Hubbard model and, in addition, for the 1D extended Hubbard and the 1D Hubbard-Holstein models. Comparisons with the photoemission data suggest that the 1D Hubbard model is not sufficient for explaining the unusual T dependence, and the long-range part of the Coulomb repulsion also needs to be included.

引用

页数：4

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