Kramers-Kronig relation of graphene conductivity
arXiv:0803.3488 · doi:10.1088/0953-8984/20/17/175222
Abstract
Utilizing a complete Lorentz-covariant and local-gauge-invariant formulation, we discuss graphene response to arbitrary external electric field. The relation, which is called as Kramers-Kr(\ddot{o})nig relation in the paper, between imaginary part and real part of ac conductivity is given. We point out there exists an ambiguity in the conductivity computing, attributed to the wick behavior at ultraviolet vicinity. We argue that to study electrical response of graphene completely, non-perturbational contribution should be considered.
7 pages
References in corpus (11)
- Unconventional Integer Quantum Hall effect in graphene
- Quantum-limited shot noise in graphene
- Unusual Microwave Response of Dirac Quasiparticles in Graphene
- Graphene Terahertz Plasmon Oscillators
- Electron transport in disordered graphene
- AC conductivity of graphene: from tight-binding model to 2+1-dimensional quantum electrodynamics
- On the minimal conductivity of graphene
- Is Graphene a Fermi Liquid?
- Robust Transport Properties in Graphene
- Excitations from Filled Landau Levels in Graphene
- Notes on the minimal longitudinal dc conductivity of perfect bilayer graphene