Enhanced d-wave pairing in the two-dimensional Hubbard model with periodically modulated hopping amplitudes

被引：0

作者：

Yang, Shuhui ^{[1
]}

Liu, Xingcan ^{[1
]}

Li, Weiqi ^{[2
]}

Yang, Jianqun ^{[3
]}

Ying, Tao ^{[1
]}

Li, Xingji ^{[3
]}

Sun, Xiudong ^{[1
,4
,5
,6
]}

机构：

[1] Harbin Inst Technol, Inst Modern Opt, Sch Phys, Harbin 150001, Peoples R China

[2] Harbin Inst Technol, Sch Phys, Harbin 150001, Peoples R China

[3] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[4] Minist Ind & Informat Technol, Key Lab Micronano Optoelect Informat Syst, Harbin 150001, Peoples R China

[5] Harbin Inst Technol, Key Lab Microopt & Photon Technol Heilongjiang Pr, Harbin 150001, Peoples R China

[6] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2022年 / 34卷 / 37期

关键词：

Hubbard model; hopping inhomogeneity; d-wave pairing; quantum Monte Carlo; CHARGE-STRIPE ORDER; SUPERCONDUCTIVITY; COMPETITION; STATE;

D O I：

10.1088/1361-648X/au7e9c

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Utilizing determinant quantum Monte Carlo algorithm, the evolution of the d-wave pairing in the Hubbard model on the square lattice tuned by the periodically modulated hopping amplitudes is studied. The hopping amplitudes are homogeneous in the (x) over cap -direction, while in the (y) over cap -direction the hopping amplitudes are modulated with period P, where t(y) = t + dt, t(y)' = t - (P - 1)dt, and the modulation period P equals 2, 3 and 4 lattice spacings. The latter two modulation periods are motivated by the observation of period-3 and period-4 stripe order in cuprate superconductors. For all the periods P, we find that the modulated hopping inhomogeneity enhances the d-wave pairing and an optimal inhomogeneity exists.

引用

页数：9

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