Electron-phonon coupling of epigraphene at millikelvin temperatures measured by quantum transport thermometry
Artikel i vetenskaplig tidskrift, 2021
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.
Författare
Bayan Karimi
Aalto-Yliopisto
Hans He
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Yu Cheng Chang
Aalto-Yliopisto
Libin Wang
Aalto-Yliopisto
J. Pekola
Aalto-Yliopisto
Moscow Institute of Physics and Technology
Rositsa Yakimova
Linköpings universitet
Naveen Shetty
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Joonas T. Peltonen
Aalto-Yliopisto
Samuel Lara Avila
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Sergey Kubatkin
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Applied Physics Letters
0003-6951 (ISSN) 1077-3118 (eISSN)
Vol. 118 10 103102Styrkeområden
Nanovetenskap och nanoteknik
Ämneskategorier
Energiteknik
Atom- och molekylfysik och optik
Den kondenserade materiens fysik
Infrastruktur
Nanotekniklaboratoriet
DOI
10.1063/5.0031315