Superconductivity and charge density wave under a time-dependent periodic field in the one-dimensional attractive Hubbard model

被引：11

作者：

Fujiuchi, Ryo ^{[1
]}

Kaneko, Tatsuya ^{[2
]}

Sugimoto, Koudai ^{[3
]}

Yunoki, Seiji ^{[4
,5
,6
]}

Ohta, Yukinori ^{[1
]}

机构：

[1] Chiba Univ, Dept Phys, Chiba 2638522, Japan

[2] Columbia Univ, Dept Phys, New York, NY 10027 USA

[3] Keio Univ, Dept Phys, Yokohama, Kanagawa 2238522, Japan

[4] RIKEN, Computat Condensed Matter Phys Lab, Cluster Pioneering Res CPR, Wako, Saitama 3510198, Japan

[5] RIKEN, Ctr Emergent Matter Sci CEMS, Computat Quantum Matter Res Team, Wako, Saitama 3510198, Japan

[6] RIKEN, Ctr Computat Sci R CCS, Computat Mat Sci Res Team, Kobe, Hyogo 6500047, Japan

来源：

PHYSICAL REVIEW B | 2020年 / 101卷 / 23期

关键词：

LIGHT-INDUCED SUPERCONDUCTIVITY; ULTRAFAST; EVOLUTION; ORDER;

D O I：

10.1103/PhysRevB.101.235122

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the competition between superconductivity (SC) and charge density wave (CDW) under a time-dependent periodic field in the attractive Hubbard model. By employing the time-dependent exact diagonalization method, we show that the driving frequency and amplitude of the external field can control the enhancement of either the superconducting pair or the CDW correlation in the system, for which SC and CDW are degenerate in the ground state of the half-filled attractive Hubbard model in the absence of the field. In the strong-coupling limit of the attractive Hubbard interaction, the controllability is characterized by the anisotropic interaction of the effective model. The anisotropy is induced by the external field and lifts the degeneracy of SC and CDW. We find that the enhancement or suppression of the superconducting pair and CDW correlations in the periodically driven attractive Hubbard model can be well interpreted by the quench dynamics of the effective model derived in the strong-coupling limit.

引用

页数：7

共 47 条

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