Optical properties of biased bilayer graphene due to gap parameter effects
arXiv:2106.11591 · doi:10.1016/j.cjph.2020.09.020
Abstract
We address the optical conductivity of undoped bilayer graphene in the presence of a finite bias voltage at finite temperature. The effects of gap parameter and stacking type on optical conductivity are discussed in the context of tight binding model Hamiltonian. Green's function approach has been implemented to find the behavior of optical conductivity of bilayer graphene within linear response theory. We have found the frequency dependence of optical conductivity for different values of gap parameter and bias voltage. Also the dependence of optical conductivity on the temperature has been investigated in details. A peak appears in the plot of optical conductivity versus frequency for different values of temperatures and bias voltage. Furthermore we find the frequency position of broad peak in optical conductivity goes to higher values with increase of gap parameter for both bernal and simple stacked bilayer graphenes.
References in corpus (18)
- Electric Field Effect in Atomically Thin Carbon Films
- The electronic properties of graphene
- Universal Dynamic Conductivity and Quantized Visible Opacity of Suspended Graphene
- Biased bilayer graphene: semiconductor with a gap tunable by electric field effect
- Asymmetry gap in the electronic band structure of bilayer graphene
- Space-time dispersion of graphene conductivity
- Landau level spectroscopy of ultrathin graphite layers
- Infrared spectroscopy of Landau levels in graphene
- Ab Initio Theory of Gate Induced Gaps in Graphene Bilayers
- Determination of the electronic structure of bilayer graphene from infrared spectroscopy results
- Sum Rules for the Optical and Hall Conductivity in Graphene
- Unified description of the dc conductivity of monolayer and bilayer graphene at finite densities based on resonant scatterers
- Optical conductivity of bilayer graphene with and without an asymmetry gap
- Transmission through a biased graphene bilayer barrier
- Dynamical conductivity of AA-stacked bilayer graphene
- Effect of Holstein phonons on the electronic properties of graphene
- Infrared probe of the anomalous magnetotransport of highly oriented pyrolytic graphite in the extreme quantum limit
- Localized states due to expulsion of resonant impurity levels from the continuum in bilayer graphene