Costa A T, Peres N M R
International Iberian Nanotechnology Laboratory, 4715-330 Braga, Portugal.
Centro de Física das Universidades do Minho e Porto and Departamento de Física and QuantaLab, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
J Phys Condens Matter. 2021 Dec 23;34(10). doi: 10.1088/1361-648X/ac3e1d.
We explore ways in which the close proximity between graphene sheets and monolayers of 2D superconductors can lead to hybridization between their collective excitations. We consider heterostructures formed by combinations of graphene sheets and 2D superconductor monolayers. The broad range of energies in which the graphene plasmon can exist, together with its tunability, makes such heterostructures promising platforms for probing the many-body physics of superconductors. We show that the hybridization between the graphene plasmon and the Bardasis-Schrieffer mode of a 2D superconductor results in clear signatures on the near-field reflection coefficient of the heterostructure, which in principle can be observed in scanning near-field microscopy experiments.
我们探索了石墨烯片层与二维超导体单层之间的紧密接近如何导致它们的集体激发之间发生杂化的方式。我们考虑由石墨烯片层和二维超导体单层组合形成的异质结构。石墨烯等离激元能够存在的能量范围很广，加上其可调性，使得此类异质结构成为探索超导体多体物理的有前景的平台。我们表明，石墨烯等离激元与二维超导体的巴达斯-施里弗尔模式之间的杂化会在异质结构的近场反射系数上产生清晰的特征，原则上可以在扫描近场显微镜实验中观察到。
