Strongly correlated superconductivity and pseudogap phase near a multiband Mott insulator

被引：69

作者：

Capone, M ^{[1
]}

Fabrizio, M

Castellani, C

Tosatti, E

机构：

[1] Enrico Fermi Ctr, Rome, Italy

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

[3] INFM, SMC, I-00185 Rome, Italy

[4] INFM, UDR Roma 1, I-00185 Rome, Italy

[5] SISSA, I-34014 Trieste, Italy

[6] INFM, UDR Trieste SISSA, I-34014 Trieste, Italy

[7] Abdus Salam Int Ctr Theoret Phys, I-34014 Trieste, Italy

[8] INFM, Democritos Natl Simulat Ctr, I-34014 Trieste, Italy

[9] Univ Paris 06, Lab Mineral Cristallog Paris, F-75252 Paris, France

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.93.047001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Near a Mott transition, strong electron correlations may enhance Cooper pairing. This is demonstrated in the dynamical mean field theory solution of a twofold-orbital degenerate Hubbard model with an inverted on-site Hund rule exchange, favoring local spin-singlet configurations. Close to the Mott insulator (which here is a local version of a valence bond insulator) a pseudogap non-Fermi-liquid metal, a superconductor, and a normal metal appear, in striking similarity with the physics of cuprates. The strongly correlated s-wave superconducting state has a larger Drude weight than the corresponding normal state. The role of the impurity Kondo problem is underscored.

引用

页码：047001 / 1

页数：4

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[11] APPARENT VIOLATION OF THE CONDUCTIVITY SUM-RULE IN CERTAIN SUPERCONDUCTORS [J].