Nodal-antinodal dichotomy and the two gaps of a superconducting doped Mott insulator

被引：69

作者：

Civelli, M. ^{[1
]}

Capone, M. ^{[2
,3
]}

Georges, A. ^{[4
]}

Haule, K. ^{[5
,6
]}

Parcollet, O. ^{[7
]}

Stanescu, T. D. ^{[8
]}

Kotliar, G. ^{[5
,6
]}

机构：

[1] Inst Max Von Laue Paul Langevin, Theory Grp, F-38042 Grenoble, France

[2] Univ Roma La Sapienza, SMC, CNR, INFM, I-00185 Rome, Italy

[3] Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy

[4] Ecole Polytech, Ctr Phys Theor, CNRS, F-91128 Palaiseau, France

[5] Rutgers State Univ, Dept Phys, Piscataway, NJ 08854 USA

[6] Rutgers State Univ, Ctr Mat Theory, Piscataway, NJ 08854 USA

[7] CEA Saclay, CEA DSM SPhT CNRS SPM URA 2306, Serv Phys Theor, F-91191 Gif Sur Yvette, France

[8] Univ Maryland, Dept Phys, Condensed Matter Theory Ctr, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.100.046402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the superconducting state of the hole-doped two-dimensional Hubbard model using cellular dynamical mean-field theory, with the Lanczos method as impurity solver. In the underdoped regime, we find a natural decomposition of the one-particle (photoemission) energy gap into two components. The gap in the nodal regions, stemming from the anomalous self-energy, decreases with decreasing doping. The antinodal gap has an additional contribution from the normal component of the self-energy, inherited from the normal-state pseudogap, and it increases as the Mott insulating phase is approached.

引用

页数：4

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NATURE, 2003, 423 (6938) :398-398

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