Electrical tunability of soft parametric resonance by hot electrons in graphene

Samwel Sekwao, Jean Pierre Leburton

Research output: Contribution to journalArticlepeer-review


We show that the onset of soft parametric resonance (SPR) at ω η ω F, where ω F e F o v f / ω O P for hot carriers interacting with optic phonons ω O P in graphene is independent of temperature, whereas η ∼ 0.56 is practically independent of the DC field F o, which makes SPR tunable over a sizeable range of Fo. Our model based on the linearization of the time-dependent Boltzmann transport equation (BTE) predicts a secondary resonance at ω ∼ ω F, emerging from a weak shoulder in the ac current at T 300 K, when the temperature decreases to T 77 K and lower. The two resonances behave differently as scattering at low energy strengthens.

Original languageEnglish (US)
Article number143108
JournalApplied Physics Letters
Issue number14
StatePublished - Sep 30 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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