Proximity of the Superconducting Dome and the Quantum Critical Point in the Two-Dimensional Hubbard Model

被引：47

作者：

Yang, S. -X. ^{[1
]}

Fotso, H. ^{[1
]}

Su, S. -Q. ^{[1
,2
]}

Galanakis, D. ^{[1
]}

Khatami, E. ^{[3
]}

She, J. -H. ^{[4
]}

Moreno, J. ^{[1
]}

Zaanen, J. ^{[4
]}

Jarrell, M. ^{[1
]}

机构：

[1] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[2] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Comp Sci & Math Div, Oak Ridge, TN 37831 USA

[3] Georgetown Univ, Dept Phys, Washington, DC 20057 USA

[4] Leiden Univ, Inst Lorentz Theoret Phys, NL-2300 RA Leiden, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.106.047004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We use the dynamical cluster approximation to understand the proximity of the superconducting dome to the quantum critical point in the two-dimensional Hubbard model. In a BCS formalism, T(c) may be enhanced through an increase in the d-wave pairing interaction (V(d)) or the bare pairing susceptibility (chi(0d)). At optimal doping, where Vd is revealed to be featureless, we find a power-law behavior of chi(0d)(omega = 0), replacing the BCS log, and strongly enhanced T(c). We suggest experiments to verify our predictions.

引用

页数：4

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