Energy-Driven Drag at Charge Neutrality in Graphene
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Song-2012-Energy-Driven Drag at Charge Neutrality in Graphene.pdf
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Author(s)
Song, Justin Chien Wen
Levitov, Leonid
Date Issued
December 2012
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Song, Justin C. W., and Leonid S. Levitov. “Energy-Driven Drag at Charge Neutrality in Graphene.” Physical Review Letters 109.23 (2012). © 2012 American Physical Society
Version
Final published version
Abstract
Coulomb coupling in graphene heterostructures results in vertical energy transfer between electrons in proximal layers. We show that, in the presence of correlated density inhomogeneity in the layers, vertical energy transfer has a strong impact on lateral charge transport. In particular, for Coulomb drag, its contribution dominates over conventional momentum drag near zero doping. The dependence on doping and temperature, which is different for the two drag mechanisms, can be used to separate these mechanisms in experiments. We predict distinct features such as a peak at zero doping and a multiple sign reversal, which provide diagnostics for this new drag mechanism.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.109.236602
