Electrical tunability of soft parametric resonance by hot electrons in graphene

Samwel Sekwao; Jean Pierre Leburton

doi:10.1063/1.4823825

Electrical tunability of soft parametric resonance by hot electrons in graphene

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Abstract

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 F_o. 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 language	English (US)
Article number	143108
Journal	Applied Physics Letters
Volume	103
Issue number	14
DOIs	https://doi.org/10.1063/1.4823825
State	Published - Sep 30 2013

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Physics and Astronomy (miscellaneous)

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10.1063/1.4823825

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title = "Electrical tunability of soft parametric resonance by hot electrons in graphene",

abstract = "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.",

author = "Samwel Sekwao and Leburton, {Jean Pierre}",

note = "Funding Information: This work was supported by ARO Grant No. W911NF-11-1-0434. The authors gratefully acknowledge the use of the Taub cluster maintained and operated by the Computational Science and Engineering Program at the University of Illinois.",

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N2 - 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.

AB - 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.

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Electrical tunability of soft parametric resonance by hot electrons in graphene

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