Signature of the Schwinger pair creation rate via radiation generated in graphene by a strong electric current

M. Lewkowicz, Hsien-Chung Kao, B. Rosenstein

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Electron-hole pairs are copiously created by an applied electric field near the Dirac point in graphene or similar two-dimensional electronic systems. It was shown recently that for sufficiently large electric fields E and ballistic times the I-V characteristics become strongly nonlinear due to Schwinger's pair creation rate, proportional to E3/2. Since there is no energy gap the radiation from the pairs' annihilation is enhanced. The spectrum of radiation is calculated and exhibits a maximum at ω=√eEvg/. The angular and polarization dependence of the emitted photons with respect to the graphene sheet is quite distinctive. For very large currents the recombination rate becomes so large that it leads to the second Ohmic regime due to radiation friction.

Original languageEnglish
Article number035414
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number3
DOIs
Publication statusPublished - 2011 Jul 11

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Electric currents
electric current
Graphene
graphene
signatures
Radiation
radiation
Electric fields
electric fields
Ballistics
ballistics
Energy gap
friction
Photons
Polarization
Friction
Electrons
photons
polarization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Signature of the Schwinger pair creation rate via radiation generated in graphene by a strong electric current. / Lewkowicz, M.; Kao, Hsien-Chung; Rosenstein, B.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 84, No. 3, 035414, 11.07.2011.

Research output: Contribution to journalArticle

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