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

作　　者：Chen Yang Chao Chen Runyu Ma Ying Liang Tianxing Ma 杨晨;陈超;马润宇;梁颖;马天星(School of Physics and Astronomy,Beijing Normal University,Beijing 100875,China;Department of Basic Courses,Naval University of Engineering,Wuhan 430033,China;Key Laboratory of Multiscale Spin Physics(Ministry of Education),Beijing Normal University,Beijing 100875,China)

机构地区：[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

出　　处：《Chinese Physics B》2024年第10期41-45,共5页中国物理B（英文版）

基　　金：supported by Beijing Natural Science Foundation(Grant No.1242022).The numerical simulations in this work were performed at HSCC of Beijing Normal University.

摘　　要：A recently discovered family of kagome lattice materials,AV_(3)Sb_(5)(A=K,Rb,Cs),has attracted great interest,especiallyin the debate over their dominant superconducting pairing symmetry.To explore this issue,we study the superconductingpairing behavior within the kagome-lattice Hubbard model through the constrained path Monte Carlo method.It isfound that doping around the Dirac point generates a dominant next-nearest-neighbor-d pairing symmetry driven by on-siteCoulomb interaction U.However,when considering the nearest-neighbor interaction V,it may induce nearest-neighbor-ppairing to become the preferred pairing symmetry.Our results provide useful information to identify the dominant superconductingpairing symmetry in the AV_(3)Sb_(5)family.

关 键 词：kagome-lattice Hubbard model SUPERCONDUCTIVITY pairing symmetry CPMC 

分 类 号：O469[理学—凝聚态物理]