标题： 扭曲双层石墨烯中不同配对对称性的磁杂质共振态 显示英文标题

标题： Magnetic-impurity resonance states for different pairing symmetries in twisted bilayer graphene

摘要： 在本工作中，我们研究了扭曲双层石墨烯超导相中不同配对对称性下的磁杂质共振态。 使用Yuan和Fu在[Phys. Rev. B 98, 045103 (2018)]中提出的两轨道模型，我们发现当杂质位于涌现蜂窝晶格的一个格点上时，共振态的空间分布将破坏属于该点群不可约表示的配对对称性的$D_3$群的三重和二重旋转对称性。 当磁性杂质位于涌现蜂窝晶格的中心时，靠近杂质位置出现的共振峰可以视为非$s$波配对的强证据。 显示英文摘要

摘要： In this work, we study the magnetic-impurity resonance states in superconducting phase of twisted bilayer graphene for different pairing symmetries. Using the two-orbital model proposed by Yuan and Fu in [Phys. Rev. B 98, 045103 (2018)], we find that when the impurity is located at one site of the emergent honeycomb lattice, the spacial distributions of the resonance states will break both the threefold and twofold rotation symmetries of $D_3$ group for pairing symmetries which belong to the irreducible representations of this point group. When the magnetic impurity is located at the center of the emergent honeycomb lattice, the appearance of resonance peak at the position close to the impurity can be considered as a strong evidence of non-$s$-wave pairing.