Pseudogap induced by short-range spin correlations in a doped Mott insulator

被引：223

作者：

Kyung, B ^{[1
]}

Kancharla, SS

Sénéchal, D

Tremblay, AMS

Civelli, M

Kotliar, G

机构：

[1] Univ Sherbrooke, Dept Phys, Sherbrooke, PQ J1K 2R1, Canada

[2] Rutgers State Univ, Dept Phys, Piscataway, NJ 08855 USA

[3] Rutgers State Univ, Ctr Mat Theory, Piscataway, NJ 08855 USA

[4] Univ Sherbrooke, Regroupement Quebecois Mat Pointe, Sherbrooke, PQ J1K 2R1, Canada

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 16期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.73.165114

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the evolution of a Mott-Hubbard insulator into a correlated metal upon doping in the two-dimensional Hubbard model using the cellular dynamical mean-field theory. Short-range spin correlations create two additional bands apart from the familiar Hubbard bands in the spectral function. Even a tiny doping into this insulator causes a jump of the Fermi energy to one of these additional bands and an immediate momentum-dependent suppression of the spectral weight at this Fermi energy. The pseudogap is closely tied to the existence of these bands. This suggests a strong-coupling mechanism that arises from short-range spin correlations and large scattering rates for the pseudogap phenomenon seen in several cuprates.

引用

页数：6

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