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Electron-phonon coupling of epigraphene at millikelvin temperatures measured by quantum transport thermometry
Aalto Univ, Finland.
Chalmers Univ Technol, Sweden.
Aalto Univ, Finland.
Aalto Univ, Finland.
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2021 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 118, no 10, article id 103102Article in journal (Refereed) Published
Abstract [en]

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 graphenes 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 T-4 dependence characteristic for a clean two-dimensional conductor. Based on our measurement, we predict the noise-equivalent power of similar to 10 - 22 W / <mml:msqrt> Hz</mml:msqrt> of the epigraphene bolometer at the low end of achievable temperatures.

Place, publisher, year, edition, pages
AMER INST PHYSICS , 2021. Vol. 118, no 10, article id 103102
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-174645DOI: 10.1063/5.0031315ISI: 000627445100001OAI: oai:DiVA.org:liu-174645DiVA, id: diva2:1541549
Note

Funding Agencies|Swedish Foundation for Strategic Research (SSF)Swedish Foundation for Strategic Research [GMT14-0077, RMA15-0024]; European Unions Horizon 2020 research and innovation program under Marie Sklodowska-Curie Grant [766025]; Russian Science FoundationRussian Science Foundation (RSF) [20-62-46026]; European UnionEuropean Commission [824109]; Chalmers Excellence Initiative Nano

Available from: 2021-04-01 Created: 2021-04-01 Last updated: 2021-04-01

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