Pairing correlation of the kagome-lattice Hubbard model with the nearest-neighbor interaction

doi:10.1088/1674-1056/ad7578

中国物理B ›› 2024, Vol. 33 ›› Issue (10): 107404-107404.doi: 10.1088/1674-1056/ad7578

所属专题： SPECIAL TOPIC — Recent progress on kagome metals and superconductors

Pairing correlation of the kagome-lattice Hubbard model with the nearest-neighbor interaction

Chen Yang(杨晨)¹, Chao Chen(陈超)^2,1, Runyu Ma(马润宇)¹, Ying Liang(梁颖)¹, and Tianxing Ma(马天星)^1,3,†

1 School of Physics and Astronomy, Beijing Normal University, Beijing 100875, China;
2 Department of Basic Courses, Naval University of Engineering, Wuhan 430033, China;
3 Key Laboratory of Multiscale Spin Physics (Ministry of Education), Beijing Normal University, Beijing 100875, China

收稿日期:2024-06-15 修回日期:2024-08-23 接受日期:2024-08-30 出版日期:2024-10-15 发布日期:2024-10-15
通讯作者: Tianxing Ma E-mail:txma@bnu.edu.cn
基金资助:
Project supported by Beijing Natural Science Foundation (Grant No. 1242022).

Pairing correlation of the kagome-lattice Hubbard model with the nearest-neighbor interaction

Chen Yang(杨晨)¹, Chao Chen(陈超)^2,1, Runyu Ma(马润宇)¹, Ying Liang(梁颖)¹, and Tianxing Ma(马天星)^1,3,†

1 School of Physics and Astronomy, Beijing Normal University, Beijing 100875, China;
2 Department of Basic Courses, Naval University of Engineering, Wuhan 430033, China;
3 Key Laboratory of Multiscale Spin Physics (Ministry of Education), Beijing Normal University, Beijing 100875, China

Received:2024-06-15 Revised:2024-08-23 Accepted:2024-08-30 Online:2024-10-15 Published:2024-10-15
Contact: Tianxing Ma E-mail:txma@bnu.edu.cn
Supported by:
Project supported by Beijing Natural Science Foundation (Grant No. 1242022).

摘要/Abstract

摘要： A recently discovered family of kagome lattice materials, ${A}\mathrm{V}_{3}\mathrm{Sb}_{5}$ (${A}=\mathrm{K,Rb,Cs}$), has attracted great interest, especially in the debate over their dominant superconducting pairing symmetry. To explore this issue, we study the superconducting pairing behavior within the kagome-lattice Hubbard model through the constrained path Monte Carlo method. It is found that doping around the Dirac point generates a dominant next-nearest-neighbor-d pairing symmetry driven by on-site Coulomb interaction $U$. However, when considering the nearest-neighbor interaction $V$, it may induce nearest-neighbor-p pairing to become the preferred pairing symmetry. Our results provide useful information to identify the dominant superconducting pairing symmetry in the ${A}\mathrm{V}_{3}\mathrm{Sb}_{5}$ family.

关键词: kagome-lattice Hubbard model, superconductivity, pairing symmetry, CPMC

Abstract: A recently discovered family of kagome lattice materials, ${A}\mathrm{V}_{3}\mathrm{Sb}_{5}$ (${A}=\mathrm{K,Rb,Cs}$), has attracted great interest, especially in the debate over their dominant superconducting pairing symmetry. To explore this issue, we study the superconducting pairing behavior within the kagome-lattice Hubbard model through the constrained path Monte Carlo method. It is found that doping around the Dirac point generates a dominant next-nearest-neighbor-d pairing symmetry driven by on-site Coulomb interaction $U$. However, when considering the nearest-neighbor interaction $V$, it may induce nearest-neighbor-p pairing to become the preferred pairing symmetry. Our results provide useful information to identify the dominant superconducting pairing symmetry in the ${A}\mathrm{V}_{3}\mathrm{Sb}_{5}$ family.

Key words: kagome-lattice Hubbard model, superconductivity, pairing symmetry, CPMC

中图分类号: (Pairing symmetries (other than s-wave))

74.20.Rp

74.72.Gh (Hole-doped) 71.10.Fd (Lattice fermion models (Hubbard model, etc.)) 02.70.Ss (Quantum Monte Carlo methods)

Chen Yang(杨晨), Chao Chen(陈超), Runyu Ma(马润宇), Ying Liang(梁颖), and Tianxing Ma(马天星). Pairing correlation of the kagome-lattice Hubbard model with the nearest-neighbor interaction[J]. 中国物理B, 2024, 33(10): 107404-107404.

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Pairing correlation of the kagome-lattice Hubbard model with the nearest-neighbor interaction

Pairing correlation of the kagome-lattice Hubbard model with the nearest-neighbor interaction

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