Energy-Driven Drag at Charge Neutrality in Graphene
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 Coulom...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2013
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| Online Access: | http://hdl.handle.net/1721.1/77181 https://orcid.org/0000-0002-4268-731X |
| _version_ | 1826215592720334848 |
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| author | Song, Justin Chien Wen Levitov, Leonid |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Song, Justin Chien Wen Levitov, Leonid |
| author_sort | Song, Justin Chien Wen |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T16:36:20Z |
| format | Article |
| id | mit-1721.1/77181 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:36:20Z |
| publishDate | 2013 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/771812022-10-02T08:22:07Z Energy-Driven Drag at Charge Neutrality in Graphene Song, Justin Chien Wen Levitov, Leonid Massachusetts Institute of Technology. Department of Physics Song, Justin Chien Wen Levitov, Leonid 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. National Science Foundation (U.S.) (Grant NSF PHY05-51164) United States. Office of Naval Research (Grant N00014-09-1- 0724) 2013-02-21T17:47:53Z 2013-02-21T17:47:53Z 2012-12 2012-05 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/77181 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 https://orcid.org/0000-0002-4268-731X en_US http://dx.doi.org/10.1103/PhysRevLett.109.236602 Physical Review Letters 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. application/pdf American Physical Society APS |
| spellingShingle | Song, Justin Chien Wen Levitov, Leonid Energy-Driven Drag at Charge Neutrality in Graphene |
| title | Energy-Driven Drag at Charge Neutrality in Graphene |
| title_full | Energy-Driven Drag at Charge Neutrality in Graphene |
| title_fullStr | Energy-Driven Drag at Charge Neutrality in Graphene |
| title_full_unstemmed | Energy-Driven Drag at Charge Neutrality in Graphene |
| title_short | Energy-Driven Drag at Charge Neutrality in Graphene |
| title_sort | energy driven drag at charge neutrality in graphene |
| url | http://hdl.handle.net/1721.1/77181 https://orcid.org/0000-0002-4268-731X |
| work_keys_str_mv | AT songjustinchienwen energydrivendragatchargeneutralityingraphene AT levitovleonid energydrivendragatchargeneutralityingraphene |