Radiation from electrons in graphene in strong electric field
arXiv:1405.1070 · doi:10.1016/j.aop.2014.08.024
Abstract
We study the interaction of electrons in graphene with the quantized electromagnetic field in the presence of an applied uniform electric field using the Dirac model of graphene. Electronic states are represented by exact solutions of the Dirac equation in the electric background, and amplitudes of first-order Feynman diagrams describing the interaction with the photon field are calculated for massive Dirac particles in both valleys. Photon emission probabilities from a single electron and from a many-electron system at the charge neutrality point are derived, including the angular and frequency dependence, and several limiting cases are analyzed. The pattern of photon emission at the Dirac point in a strong field is determined by an interplay between the nonperturbative creation of electron-hole pairs and spontaneous emission, allowing for the possibility of observing the Schwinger effect in measurements of the radiation emitted by pristine graphene under DC voltage.
41 pages, 1 figure
References in corpus (14)
- The electronic properties of graphene
- Quantum interference and Klein tunneling in graphene heterojunctions
- Colloquium: The transport properties of graphene: An introduction
- Evidence of Klein tunneling in graphene p-n junctions
- AC conductivity of graphene: from tight-binding model to 2+1-dimensional quantum electrodynamics
- The Coulomb impurity problem in graphene
- Vacuum Polarization and Screening of Supercritical Impurities in Graphene
- Atomic Collapse and Quasi-Rydberg States in Graphene
- How close can one approach the Dirac point in graphene experimentally?
- The Schwinger mechanism and graphene
- Atomic collapse, Lorentz boosts, Klein scattering, and other quantum-relativistic phenomena in graphene
- Dynamics of the particle - hole pair creation in graphene
- Dirac fermions in strong electric field and quantum transport in graphene
- Euler - Heisenberg effective action and magnetoelectric effect in multilayer graphene