標題: Signature of Schwinger's pair creation rate via radiation generated in graphene by strong electric current
作者: Rosenstein, B.
Lewkowicz, M.
Kao, H. C.
電子物理學系
Department of Electrophysics
公開日期: 2012
摘要: Electron - hole pairs are copuously created by an applied electric field near the Dirac point in graphene or similar 2D 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 eEvg/(h) over bar. 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://hdl.handle.net/11536/21128
http://dx.doi.org/10.1088/1742-6596/400/4/042051
ISSN: 1742-6588
DOI: 10.1088/1742-6596/400/4/042051
期刊: 26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5
Volume: 400
顯示於類別:會議論文


文件中的檔案:

  1. 000314977100411.pdf