凝聚态物理
超导电性
物理
而量子蒙特卡罗
电场
反铁磁性
配对
赫巴德模型
双层石墨烯
蒙特卡罗方法
库仑
石墨烯
量子力学
电子
数学
统计
作者
Shi-Chao Fang,Xiaojun Zheng,Hai‐Qing Lin,Zhongbing Huang
标识
DOI:10.1088/1361-648x/abb685
摘要
Using the constrained-path quantum Monte Carlo method, we systematically study the half-filled Hubbard model on AA-stacked honeycomb lattice. Our simulations demonstrate that a dominant chiral d + id wave superconductivity can be induced by a perpendicular electric field. At a fixed electric field, the effective pairing interaction of chiral d + id superconductivity exhibits an increasing behavior with increasing the on-site Coulomb interaction. We attribute the electric field-induced d + id superconductivity to an increased density of states near the Fermi energy and robust antiferromagnetic spin correlation upon turning on electric field. Our results strongly suggest that the AA-stacked graphene system is a good candidate for chiral d + id superconductor.
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