Soft parametric resonance for hot carriers in graphene

Samwel Sekwao, Jean-Pierre Leburton

Research output: Contribution to journalArticlepeer-review

Abstract

We show that hot carriers scattered by optic phonons in graphene undergo an anomalous parametric resonance when modulated by an ac field, at about half of the frequency ωF=2πeFvfop, corresponding to ballistic acceleration up to the phonon energy ωF=2πeFvfop in the presence of a dc field F. The resonance occurs in the terahertz range and is tunable with dc electric fields. Dephasing between the current and the ac field also exhibits a nonzero minimum at resonance for weak elastic scattering, while increasing monotonously with ac frequency for strong elastic scattering. The overall effect would also manifest in a long-range spatially varying periodic potential.

Original languageEnglish (US)
Article number155424
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume87
Issue number15
DOIs
StatePublished - Apr 19 2013

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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