29 research outputs found
Feature-rich plasmon excitations in sliding bilayer graphene
The tight-binding model is closely associated with the modified layer-based
random-phase approximation to thoroughly investigate the electron-electron
interactions in sliding bilayer graphene. The Coulomb interactions and
intralayer and interlayer atomic interactions dominate the collective and
electron-hole excitations. The unusual energy bands are directly reflected in
the diverse transferred momentum-frequency phase diagrams. In general, there
exist two kinds of plasmon modes during the variation of the doping level in
sliding bilayer graphene, being accompanied with the complicated intraband and
interband single-particle excitations. The excitation behaviors are greatly
diversified by the relative shift between two graphene layers. The theoretical
predictions can be verified by high-resolution experimental examinations.Comment: 20 pages, 10 figure