Pairing in the Hubbard model on the honeycomb lattice with hopping up to the third-nearest-neighbor

被引：5

作者：

Jia, Peizhe ^{[1
]}

Yang, Shuhui ^{[1
]}

Li, Weiqi ^{[1
]}

Yang, Jianqun ^{[2
]}

Ying, Tao ^{[1
]}

Li, Xingji ^{[2
]}

Sun, Xiudong ^{[3
,4
,5
,6
]}

机构：

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

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

[3] Harbin Inst Technol, Inst Modern Opt, Sch Phys, 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：

PHYSICS LETTERS A | 2022年 / 442卷

关键词：

Hubbard model; Pairing symmetry; Quantum Monte Carlo; Second-nearest-neighbor hopping; Third-nearest-neighbor hopping; SIGN PROBLEM; GRAPHENE; TRANSPORT; SUPERCONDUCTIVITY;

D O I：

10.1016/j.physleta.2022.128175

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electronic properties of graphene can be approximately described by the standard Hubbard model on the honeycomb lattice. It was argued that the d + id-wave pairing is the dominant pairing symmetry in such a system. However, in the standard Hubbard model, only the nearest-neighbor hopping t(1) is considered, while the second-nearest-neighbor hopping t(2) and third-nearest-neighbor hopping t(3) are ignored. In this paper, by doing the determinant quantum Monte Carlo simulations of the Hubbard model with hopping up to the third-nearest-neighbor, we examine the effect of t(2) and t(3) on the pairing symmetries. We find that the second- and third-nearest-neighbor hopping amplitudes have strong effect on the d + id-wave pairing symmetry. (C) 2022 Elsevier B.V. All rights reserved.

引用

页数：6

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