Dynamical properties of quasiparticles in a tunable Kekul\'{e} graphene superlattice
Abstract
We investigate the dynamical properties of quasiparticles in graphene superlattices with three typical Kekul\'{e} distortions (i.e., Kekul\'{e}-O, Kekul\'{e}-Y and Kekul\'{e}-M). On the one hand, we numerically show the visualized evolution process of Kekul\'{e} quasiparticles; while on the other hand, we analytically obtain the centroid trajectory of the quasiparticles, and both of them agree well with each other. The results reveal that the relativistic Zitterbewegung (ZB) phenomenon occurs in the Kekul\'{e} systems. Furthermore, through analyzing the frequency of ZB, we unveil the one-to-one relationship between ZB and Kekul\'{e} textures, i.e., the ZB frequenies of Kekul\'{e}-O, Kekul\'{e}-Y and Kekul\'{e}-M quasiparticles feature single, double and six frequencies, respectively. Finally, we propose a scheme to distinguish among different Kekul\'{e} textures from the dynamical perspective. The predictions in this paper are expected to be experimentally verified in the near future, so as to facilitate further research of Kekul\'{e} structures in solid materials or artificial systems.
Keywords
Cite
@article{arxiv.2304.08227,
title = {Dynamical properties of quasiparticles in a tunable Kekul\'{e} graphene superlattice},
author = {Xiao-Yu Xiong and Xi-Dan Hu and Qizhong Zhu and Zhi Li},
journal= {arXiv preprint arXiv:2304.08227},
year = {2023}
}