北京师范大学学报（自然科学版）2023，Vol.59Issue(6)：920-925,6.DOI:10.12202/j.0476-0301.2023188
掺杂棋盘晶格中的d波超导配对对称性
d-wave superconducting pairing symmetry in doped checkerboard lattice
摘要
Abstract
To understand strong correlated electron states in a checkerboard lattice is an important problem.In frustrated systems,quantum Monte Carlo simulation often suffers the sign problem.We use constrained path quantum Monte Carlo(CPQMC)method to effectively avoid the sign problem,and study superconducting pairing correlation in doped Hubbard model on a checkerboard lattice.Superconducting pairing correlation function with d-wave symmetry is found to dominate over other symmetries.The d-wave pairing correlation function increases with next-nearest neighbor hopping strength'decreases,and increases when the Coulomb interaction increases.These data provide some valid points for further theoretical research on correlation effect and superconductivity in superconductors,and also provide ideas for understanding relationship between frustration and superconductivity.关键词
棋盘晶格/超导电性/量子蒙特卡罗方法/配对对称性Key words
checkerboard lattice/superconductivity/CPQMC/pairing symmetry分类
数理科学引用本文复制引用
潘月,马润宇,马天星..掺杂棋盘晶格中的d波超导配对对称性[J].北京师范大学学报（自然科学版）,2023,59(6):920-925,6.基金项目
国家自然科学基金资助项目(11974049) （11974049）
