Electron-phonon coupling of epigraphene at millikelvin temperatures measured by quantum transport thermometry
Journal article, 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.

Author

Bayan Karimi

Aalto University

Hans He

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Yu Cheng Chang

Aalto University

Libin Wang

Aalto University

J. Pekola

Aalto University

Moscow Institute of Physics and Technology

Rositsa Yakimova

Linköping University

Naveen Shetty

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Joonas T. Peltonen

Aalto University

Samuel Lara Avila

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Sergey Kubatkin

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Applied Physics Letters

0003-6951 (ISSN) 1077-3118 (eISSN)

Vol. 118 10 103102

Subject Categories

Energy Engineering

Atom and Molecular Physics and Optics

Condensed Matter Physics

DOI

10.1063/5.0031315

More information

Latest update

3/25/2021