Dynamics of particle-hole pair creation in graphene

M. Lewkowicz*, Rosenstein Baruch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

The process of coherent creation of particle-hole excitations by an electric field in graphene is quantitatively described. We calculate the evolution of the current density, number of pairs, and energy after switching on the electric field. In particular, it leads to a dynamical visualization of universal finite resistivity without dissipation in pure graphene. We show that the dc conductivity of pure graphene is π2e2h rather than the often cited value of 4πe2h. This value coincides with the ac conductivity calculated and measured recently at optical frequencies. The effect of temperature and random chemical potential (charge puddles) are considered and explain the recent experiment on suspended graphene. A possibility of Bloch oscillations is discussed within the tight binding model.

Original languageEnglish
Article number106802
JournalPhysical Review Letters
Volume102
Issue number10
DOIs
StatePublished - 9 Mar 2009

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