So far, it has been observed in various materials, including recently in so-called multilayer graphene allotropes (i.e., materials that consist of several layers of a hexagonal carbon lattice).

The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.jpcc.4c06488.

Anhui Province Key Laboratory for Control and Applications of Optoelectronic Information Materials, Key Laboratory of Functional Molecular Solids Ministry of Education, Department of Physics, Anhui ...