標題: Signature of the Schwinger pair creation rate via radiation generated in graphene by a strong electric current
作者: Lewkowicz, M.
Kao, H. C.
Rosenstein, B.
電子物理學系
Department of Electrophysics
公開日期: 20-七月-2011
摘要: 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 E(3/2). 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 omega = root eEv(g)/h. 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.
URI: http://dx.doi.org/10.1103/PhysRevB.84.035414
http://hdl.handle.net/11536/21515
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.84.035414
期刊: PHYSICAL REVIEW B
Volume: 84
Issue: 3
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