Nonthermal symmetry-broken states in the strongly interacting Hubbard model

被引：66

作者：

Werner, Philipp ^{[1
]}

Tsuji, Naoto ^{[1
]}

Eckstein, Martin ^{[2
]}

机构：

[1] Univ Fribourg, Dept Phys, CH-1700 Fribourg, Switzerland

[2] Univ Hamburg, Max Planck Res Dept Struct Dynam, CFEL, Hamburg, Germany

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 20期

基金：

瑞士国家科学基金会;

关键词：

T-J MODEL; HIGH DIMENSIONS; DYNAMICS; SUPERCONDUCTIVITY; SYSTEMS; HOLE;

D O I：

10.1103/PhysRevB.86.205101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the time evolution of the antiferromagnetic order parameter after interaction quenches in the Hubbard model. Using the nonequilibrium dynamical mean-field formalism, we show that the system, after a quench from intermediate to strong interaction, is trapped in a nonthermal state which is reminiscent of a photodoped state and protected by the slow decay of doublons. If the effective doping of this state is low enough, it exhibits robust antiferromagnetic order, even if the system is highly excited and the thermal state is thus expected to be paramagnetic. We comment on the implication of our findings for the stability of nonthermal superconducting states.

引用

页数：7

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