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Paper detail

Electron-phonon coupling in suspended graphene: supercollisions by ripples

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.

preprint2015arXivOpen access
Antti LaitinenMika OksanenAurélien FayDaniel CoxMatti TomiPauli VirtanenPertti Hakonen
cond-mat.mes-hall
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Antti LaitinenMika OksanenAurélien FayDaniel CoxMatti TomiPauli VirtanenPertti Hakonen

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