Ballistic transport in graphene beyond linear response

B. Rosenstein, M. Lewkowicz, H. C. Kao, Y. Korniyenko

研究成果: 雜誌貢獻文章同行評審

52 引文 斯高帕斯(Scopus)

摘要

The process of coherent creation of particle-hole excitations by an electric field in graphene is quantitatively described beyond linear response. We calculate the evolution of current density, number of pairs and energy in ballistic regime for electric field E using the tight-binding model. While for ballistic flight times smaller than tnl E-1/2 current is linear in E and independent of time, for larger ballistic times the current increases after tnl as J E3/2 t and finally at yet larger times (t> tB E-1) Bloch oscillations set in. It is shown that the number of pairs follows the 2D generalization of the Schwinger's creation rate n E3/2 only on certain time segments with a prefactor different from that obtained using the asymptotic formula.

原文英語
文章編號041416
期刊Physical Review B - Condensed Matter and Materials Physics
81
發行號4
DOIs
出版狀態已發佈 - 2010 一月 29

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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