Coulomb Drag Mechanisms in Graphene
Recent measurements revealed an anomalous Coulomb drag in graphene, hinting at new physics at charge neutrality. The anomalous drag is explained by a new mechanism based on energy transport, which involves interlayer energy transfer, coupled to charge flow via lateral heat currents and thermopower....
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Chemical Society (ACS)
2015
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| Online Access: | http://hdl.handle.net/1721.1/98224 https://orcid.org/0000-0002-4268-731X |
| _version_ | 1811088413566173184 |
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| author | Abanin, Dmitry A. Song, Justin C. W. Levitov, Leonid |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Abanin, Dmitry A. Song, Justin C. W. Levitov, Leonid |
| author_sort | Abanin, Dmitry A. |
| collection | MIT |
| description | Recent measurements revealed an anomalous Coulomb drag in graphene, hinting at new physics at charge neutrality. The anomalous drag is explained by a new mechanism based on energy transport, which involves interlayer energy transfer, coupled to charge flow via lateral heat currents and thermopower. The old and new drag mechanisms are governed by distinct physical effects, resulting in starkly different behavior, in particular for drag magnitude and sign near charge neutrality. The new mechanism explains the giant enhancement of drag near charge neutrality, as well as its sign and anomalous sensitivity to the magnetic field. Under realistic conditions, energy transport dominates in a wide temperature range, giving rise to a universal value of drag which is essentially independent of the electron–electron interaction strength. |
| first_indexed | 2024-09-23T14:01:48Z |
| format | Article |
| id | mit-1721.1/98224 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:01:48Z |
| publishDate | 2015 |
| publisher | American Chemical Society (ACS) |
| record_format | dspace |
| spelling | mit-1721.1/982242022-10-01T18:39:59Z Coulomb Drag Mechanisms in Graphene Abanin, Dmitry A. Song, Justin C. W. Levitov, Leonid Massachusetts Institute of Technology. Department of Physics Song, Justin C. W. Levitov, Leonid Recent measurements revealed an anomalous Coulomb drag in graphene, hinting at new physics at charge neutrality. The anomalous drag is explained by a new mechanism based on energy transport, which involves interlayer energy transfer, coupled to charge flow via lateral heat currents and thermopower. The old and new drag mechanisms are governed by distinct physical effects, resulting in starkly different behavior, in particular for drag magnitude and sign near charge neutrality. The new mechanism explains the giant enhancement of drag near charge neutrality, as well as its sign and anomalous sensitivity to the magnetic field. Under realistic conditions, energy transport dominates in a wide temperature range, giving rise to a universal value of drag which is essentially independent of the electron–electron interaction strength. Nature Society (Singapore) 2015-08-25T18:56:15Z 2015-08-25T18:56:15Z 2013-07 2013-06 Article http://purl.org/eprint/type/JournalArticle 1530-6984 1530-6992 http://hdl.handle.net/1721.1/98224 Song, J. C. W., D. A. Abanin, and L. S. Levitov. “Coulomb Drag Mechanisms in Graphene.” Nano Lett. 13, no. 8 (August 14, 2013): 3631–3637. https://orcid.org/0000-0002-4268-731X en_US http://dx.doi.org/10.1021/nl401475u Nano 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 Chemical Society (ACS) arXiv |
| spellingShingle | Abanin, Dmitry A. Song, Justin C. W. Levitov, Leonid Coulomb Drag Mechanisms in Graphene |
| title | Coulomb Drag Mechanisms in Graphene |
| title_full | Coulomb Drag Mechanisms in Graphene |
| title_fullStr | Coulomb Drag Mechanisms in Graphene |
| title_full_unstemmed | Coulomb Drag Mechanisms in Graphene |
| title_short | Coulomb Drag Mechanisms in Graphene |
| title_sort | coulomb drag mechanisms in graphene |
| url | http://hdl.handle.net/1721.1/98224 https://orcid.org/0000-0002-4268-731X |
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