skip to main content

SciTech ConnectSciTech Connect

Title: The Coulomb excitations of Bernal bilayer graphene under external fields

We study the field effects on the Coulomb excitation spectrum of Bernal bilayer graphene by using the tight-binding model and the random-phase approximation. The electric field opens the band gap and creates the saddle points, the latter brings about a prominent interband plasmon. On the other hand, the magnetic field induces the dispersionless Landau levels (LLs) that causes the inter-LL plasmons. The two kinds of field-induced plasmon modes can be further tuned by the magnitude of momentum transfer and the field strength. The predicted results may be further validated by the inelastic light-scattering or high-resolution electron-energy-loss spectroscopy (HREELLS)
Authors:
;  [1]
  1. Department of Physics, National Cheng-Kung University, Tainan 701, Taiwan (China)
Publication Date:
OSTI Identifier:
22265925
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1590; Journal Issue: 1; Conference: International conference on electronic, photonic, plasmonic and magnetic properties of nanomaterials, London (Canada), 12-16 Aug 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 77 NANOSCIENCE AND NANOTECHNOLOGY; COULOMB EXCITATION; ELECTRIC FIELDS; ENERGY-LOSS SPECTROSCOPY; GRAPHENE; LIGHT SCATTERING; MAGNETIC FIELDS; MOMENTUM TRANSFER; PLASMONS; RANDOM PHASE APPROXIMATION; SPECTRA