Radiation from electrons in graphene in strong electric field
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Publication:527628
DOI10.1016/J.AOP.2014.08.024zbMATH Open1360.81348arXiv1405.1070OpenAlexW1998002250MaRDI QIDQ527628
Publication date: 12 May 2017
Published in: Annals of Physics (Search for Journal in Brave)
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.
Full work available at URL: https://arxiv.org/abs/1405.1070
Interacting particle systems in time-dependent statistical mechanics (82C22) Many-body theory; quantum Hall effect (81V70) Quantum dynamics and nonequilibrium statistical mechanics (general) (82C10)
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- QUANTUM FIELD THEORY IN GRAPHENE
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