We investigate the basic charge and heat transport properties of charge neutral epigraphene at sub-kelvin temperatures, demonstrating nearly logarithmic dependence of electrical conductivity over more than two decades in temperature. Using graphene's sheet conductance as 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 clean two-dimensional conductor. Based on our measurement we predict the noise-equivalent power of ∼10−22W/Hz of epigraphene bolometer at the low end of achievable temperatures.
@article{arxiv.2009.14038,
title = {Electron-phonon coupling of epigraphene at millikelvin temperatures},
author = {Bayan Karimi and Hans He and Yu-Cheng Chang and Libin Wang and Jukka P. Pekola and Rositsa Yakimova and Naveen Shetty and Joonas T. Peltonen and Samuel Lara-Avila and Sergey Kubatkin},
journal= {arXiv preprint arXiv:2009.14038},
year = {2020}
}