Pseudogap and Fermi arc in κ-type organic superconductors

被引：15

作者：

Kang, Jing ^{[1
,2
]}

Yu, Shun-Li ^{[1
,2
]}

Xiang, Tao ^{[3
,4
]}

Li, Jian-Xin ^{[1
,2
]}

机构：

[1] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China

[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

[3] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China

[4] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 06期

基金：

中国国家自然科学基金;

关键词：

MOTT TRANSITION; C-13; NMR;

D O I：

10.1103/PhysRevB.84.064520

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The quasiparticle spectra of the Hubbard model on the anisotropic triangle lattice at half filling is studied using the cluster perturbation theory and applied to the organic superconductor kappa-(BEDT-TTF)(2)X. We find that a d(x2-y2)-wave-like pseudogap phase emerges in the intermediate-coupling regime. Near the critical line of the Mott insulating transition, the Fermi surface becomes segmented with a Fermi arc, due to the partial opening of the Mott gap along the Fermi surface. The pseudogap with the Fermi arc is shown to be a precursor to the Mott insulator.

引用

页数：5

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