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 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.

中文翻译：

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AA 堆叠双层石墨烯中电场诱导的手性 d+id 超导性：量子蒙特卡罗研究

使用约束路径量子蒙特卡罗方法，我们系统地研究了AA堆叠蜂窝晶格上的半填充哈伯德模型。我们的模拟表明，垂直电场可以感应出主要的手性 d+id 波超导性。在固定电场下，手性 d+id 超导的有效配对相互作用随着现场库仑相互作用的增加而表现出增加的行为。我们将电场诱导的 d+id 超导性归因于费米能量附近状态密度的增加和开启电场时强大的反铁磁自旋相关性。我们的结果强烈表明 AA 堆叠的石墨烯系统是手性 d+id 超导体的良好候选者。