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Special Issue:
SPECIAL TOPIC — Recent progress on kagome metals and superconductors
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| SPECIAL TOPIC — Recent progress on kagome metals and superconductors |
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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 |
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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.
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Received: 15 June 2024
Revised: 23 August 2024
Accepted manuscript online: 30 August 2024
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PACS:
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74.20.Rp
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(Pairing symmetries (other than s-wave))
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74.72.Gh
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(Hole-doped)
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71.10.Fd
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(Lattice fermion models (Hubbard model, etc.))
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02.70.Ss
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(Quantum Monte Carlo methods)
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| Fund: Project supported by Beijing Natural Science Foundation (Grant No. 1242022). |
Corresponding Authors:
Tianxing Ma
E-mail: txma@bnu.edu.cn
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Cite this article:
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 2024 Chin. Phys. B 33 107404
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