2018/12/28 by Cheng-Hsueh Yang, Yang, Cheng-Hsueh, Ting-Wei Jang +5
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Graphene research and applications #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum and electron transport phenomena #Surface and Thin Film Phenomena
paper · pdf · doi:10.48550/arxiv.1812.11050
openalex publication_date 2018/12/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Low-energy electronic properties of ABC-stacked graphite are studied by the tight-binding model. There are linear and parabolic bands with and without degeneracy. They show strongly anisotropic dispersions. ABC-stacked grahite is a semimetal due to slight overlapping near the Fermi level beween conduction and valence bands. The interlayer interactions could change the energy dispersion, state degeneracy, and positions of band-crossing and band-edge state. Density of states exhibit a shoulder structure, owing to band-edge states near or at high symmetric points. Low-frequency Coulomb excitation properties with different transferred momenta (\bf q's) are further studied within the random phase approximation. The Landau dampings is too serious under the parallel transferred momentum (\bf q⊥ z); therefore, it is impossible to observe the 3D optical plasmons. However, even for the perpendicular transferred momentum (\bf q∥ z), the full assistance due to the thermal excitations is necessary to induce the collective charge oscillations along the z-axis. The height and position of temperature-induced plasmon peak in the energy loss spectrum are greatly enhanced by the increasing temperature, but weakly depend on the various transferred momenta. These features are very different from AA- and AB-stacked graphites.