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Wiedemann-Franz relation and thermal-transistor effect in suspended graphene.

Author(s): Yigen S, Champagne AR

Nano Lett. 2014 Jan 08;14(1):289-93 Authors: Yiğen S, Champagne AR

Article GUID: 24341325
Tailoring 10 nm scale suspended graphene junctions and quantum dots.

Author(s): Tayari V, McRae AC, Yigen S, Island JO, Porter JM, Champagne AR

Nano Lett. 2015 Jan 14;15(1):114-9 Authors: Tayari V, McRae AC, Yiğen S, Island JO, Porter JM, Champagne AR

Article GUID: 25490053
Title:Wiedemann-Franz relation and thermal-transistor effect in suspended graphene.
Authors:Yigen S,  Champagne AR
Link:https://www.ncbi.nlm.nih.gov/pubmed/24341325?dopt=Abstract
Category:Nano Lett
PMID:24341325
Dept Affiliation: PHYSICS
1 Department of Physics, Concordia University , Montréal, Québec, H4B 1R6 Canada.

Description:

Wiedemann-Franz relation and thermal-transistor effect in suspended graphene.

Nano Lett. 2014 Jan 08;14(1):289-93

Authors: Yigen S, Champagne AR

Abstract

We extract experimentally the electronic thermal conductivity, Ke, in suspended graphene that we dope using a back-gate electrode. We make use of two-point dc electron transport at low bias voltages and intermediate temperatures (50-160 K), where the electron and lattice temperatures are decoupled. The thermal conductivity is proportional to the charge conductivity times the temperature, confirming that the Wiedemann-Franz relation is obeyed in suspended graphene. We extract an estimate of the Lorenz coefficient as 1.1-1.7 × 10(-8) W OK(-2). Ke shows a transistor effect and can be tuned with the back-gate by more than a factor of 2 as the charge carrier density ranges from ~0.5 to 1.8 × 10(11) cm(-2).

PMID: 24341325 [PubMed]