Electron-phonon coupling of epigraphene at millikelvin temperatures measured by quantum transport thermometry

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-03-08
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en
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Applied Physics Letters, Volume 118, issue 10
Abstract
We investigate the basic charge and heat transport properties of charge neutral epigraphene at sub-kelvin temperatures, demonstrating a nearly logarithmic dependence of electrical conductivity over more than two decades in temperature. Using graphene's sheet conductance as an in situ thermometer, we present a measurement of electron-phonon heat transport at mK temperatures and show that it obeys the T4 dependence characteristic for a clean two-dimensional conductor. Based on our measurement, we predict the noise-equivalent power of ∼ 10 - 22 W / Hz of the epigraphene bolometer at the low end of achievable temperatures.
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| openaire: EC/H2020/766025/EU//QuESTech
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Citation
Karimi , B , He , H , Chang , Y C , Wang , L , Pekola , J P , Yakimova , R , Shetty , N , Peltonen , J T , Lara-Avila , S & Kubatkin , S 2021 , ' Electron-phonon coupling of epigraphene at millikelvin temperatures measured by quantum transport thermometry ' , Applied Physics Letters , vol. 118 , no. 10 , 103102 . https://doi.org/10.1063/5.0031315