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Electron-phonon Coupling in Suspended Graphene: Supercollisions by Ripples

Overview
Journal Nano Lett
Specialty Biotechnology
Date 2014 May 21
PMID 24842236
Citations 11
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Abstract

Using electrical transport experiments and shot noise thermometry, we find strong evidence that "supercollision" scattering processes by flexural modes are the dominant electron-phonon energy transfer mechanism in high-quality, suspended graphene around room temperature. The power law dependence of the electron-phonon coupling changes from cubic to quintic with temperature. The change of the temperature exponent by two is reflected in the quadratic dependence on chemical potential, which is an inherent feature of two-phonon quantum processes.

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