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Measurement of the Electronic Thermal Conductance Channels and Heat Capacity of Graphene at Low Temperature

Fong, Kin Chung and Wollman, Emma E. and Ravi, Harish and Chen, Wei and Clerk, Aashish A. and Shaw, M. D. and LeDuc, H. G. and Schwab, K. C. (2013) Measurement of the Electronic Thermal Conductance Channels and Heat Capacity of Graphene at Low Temperature. Physical Review X, 3 (4). Art. No. 041008. ISSN 2160-3308. doi:10.1103/PhysRevX.3.041008.

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The ability to transport energy is a fundamental property of the two-dimensional Dirac fermions in graphene. Electronic thermal transport in this system is relatively unexplored and is expected to show unique fundamental properties and to play an important role in future applications of graphene, including optoelectronics, plasmonics, and ultrasensitive bolometry. Here, we present measurements of bipolar thermal conductances due to electron diffusion and electron-phonon coupling and infer the electronic specific heat, with a minimum value of 10k_B (10^(−22)  J/K) per square micron. We test the validity of the Wiedemann-Franz law and find that the Lorenz number equals 1.32×(π^2/3)(kB/^e)^2. The electron-phonon thermal conductance has a temperature power law T^2 at high doping levels, and the coupling parameter is consistent with recent theory, indicating its enhancement by impurity scattering. We demonstrate control of the thermal conductance by electrical gating and by suppressing the diffusion channel using NbTiN superconducting electrodes, which sets the stage for future graphene-based single-microwave photon detection.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Wollman, Emma E.0000-0002-5474-3745
Clerk, Aashish A.0000-0001-7297-9068
Schwab, K. C.0000-0001-8216-4815
Additional Information:© 2013 American Physical Society. Received 29 June 2013; published 29 October 2013. We acknowledge helpful conversations with P. Kim, J. Hone, E. Henriksen, and D. Nandi. This work was supported in part by (1) the FAME Center, one of six centers of STARnet, a Semiconductor Research Corporation program sponsored by MARCO and DARPA, (2) the US NSF (DMR-0804567), (3) the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center with support of the Gordon and Betty Moore Foundation, and (4) the Department of Energy Office of Science Graduate Fellowship Program (DOE SCGF), made possible in part by the American Recovery and Reinvestment Act of 2009, administered by ORISE-ORAU under contract no. DE-AC05-06OR23100. We are grateful to G. Rossman for the use of a Raman spectroscopy setup. Device fabrication was performed at the Kavli Nanoscience Institute (Caltech) and at the Micro Device Laboratory (NASA/JPL), and part of the research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.
Group:Institute for Quantum Information and Matter, Kavli Nanoscience Institute
Funding AgencyGrant Number
Semiconductor Research CorporationUNSPECIFIED
Microelectronics Advanced Research Corporation (MARCO)UNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
NSF Physics Frontiers CenterUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Department of Energy (DOE)DE-AC05-06OR23100
American Recovery and Reinvestment Act (ARRA)UNSPECIFIED
Subject Keywords:Condensed Matter Physics, Graphene
Issue or Number:4
Classification Code:PACS: 65.80.Ck, 68.65.-k, and 07.20.Mc
Record Number:CaltechAUTHORS:20130827-110003002
Persistent URL:
Official Citation:Measurement of the Electronic Thermal Conductance Channels and Heat Capacity of Graphene at Low Temperature Kin Chung Fong, Emma E. Wollman, Harish Ravi, Wei Chen, Aashish A. Clerk, M. D. Shaw, H. G. Leduc, and K. C. Schwab Published 29 October 2013 (7 pages) 041008
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:40956
Deposited By: Tony Diaz
Deposited On:29 Aug 2013 23:17
Last Modified:10 Nov 2021 04:24

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