The Coulomb excitations of Bernal bilayer graphene under external fields

Journal Article · Mon Mar 31 04:00:00 EDT 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4870211· OSTI ID:22265925

Wu, Jhao-Ying; Lin, Ming-Fa ^[1]

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1. Department of Physics, National Cheng-Kung University, Tainan 701, Taiwan (China)

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)

• OSTI ID: 22265925
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1590; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
COULOMB EXCITATION
ELECTRIC FIELDS
ENERGY-LOSS SPECTROSCOPY
GRAPHENE
LIGHT SCATTERING
MAGNETIC FIELDS
MOMENTUM TRANSFER
PLASMONS
RANDOM PHASE APPROXIMATION
SPECTRA