Electron-electron interactions and plasmon dispersion in graphene
Plasmons in two-dimensional electron systems with nonparabolic bands, such as graphene, feature strong dependence on electron-electron interactions. We use a many-body approach to relate plasmon dispersion at long wavelengths to Landau Fermi-liquid interactions and quasiparticle velocity. An identic...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/88762 https://orcid.org/0000-0002-4268-731X |
| _version_ | 1826213419215224832 |
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| author | Shtyk, A. Feigelman, M. Levitov, Leonid |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Shtyk, A. Feigelman, M. Levitov, Leonid |
| author_sort | Shtyk, A. |
| collection | MIT |
| description | Plasmons in two-dimensional electron systems with nonparabolic bands, such as graphene, feature strong dependence on electron-electron interactions. We use a many-body approach to relate plasmon dispersion at long wavelengths to Landau Fermi-liquid interactions and quasiparticle velocity. An identical renormalization is shown to arise for the magnetoplasmon resonance. For a model with N ≫ 1 fermion species, this approach predicts a power-law dependence for plasmon frequency vs carrier concentration, valid in a wide range of doping densities, both high and low. Gate tunability of plasmons in graphene can be exploited to directly probe the effects of electron-electron interaction. |
| first_indexed | 2024-09-23T15:48:48Z |
| format | Article |
| id | mit-1721.1/88762 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:48:48Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/887622022-09-29T16:18:26Z Electron-electron interactions and plasmon dispersion in graphene Shtyk, A. Feigelman, M. Levitov, Leonid Massachusetts Institute of Technology. Department of Physics Levitov, Leonid Plasmons in two-dimensional electron systems with nonparabolic bands, such as graphene, feature strong dependence on electron-electron interactions. We use a many-body approach to relate plasmon dispersion at long wavelengths to Landau Fermi-liquid interactions and quasiparticle velocity. An identical renormalization is shown to arise for the magnetoplasmon resonance. For a model with N ≫ 1 fermion species, this approach predicts a power-law dependence for plasmon frequency vs carrier concentration, valid in a wide range of doping densities, both high and low. Gate tunability of plasmons in graphene can be exploited to directly probe the effects of electron-electron interaction. MIT Skoltech Initiative 2014-08-18T16:15:03Z 2014-08-18T16:15:03Z 2013-12 2013-02 Article http://purl.org/eprint/type/JournalArticle 1098-0121 1550-235X http://hdl.handle.net/1721.1/88762 Levitov, L., A. Shtyk, and M. Feigelman. “Electron-Electron Interactions and Plasmon Dispersion in Graphene.” Phys. Rev. B 88, no. 23 (December 2013). © 2013 American Physical Society https://orcid.org/0000-0002-4268-731X en_US http://dx.doi.org/10.1103/PhysRevB.88.235403 Physical Review B 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 American Physical Society |
| spellingShingle | Shtyk, A. Feigelman, M. Levitov, Leonid Electron-electron interactions and plasmon dispersion in graphene |
| title | Electron-electron interactions and plasmon dispersion in graphene |
| title_full | Electron-electron interactions and plasmon dispersion in graphene |
| title_fullStr | Electron-electron interactions and plasmon dispersion in graphene |
| title_full_unstemmed | Electron-electron interactions and plasmon dispersion in graphene |
| title_short | Electron-electron interactions and plasmon dispersion in graphene |
| title_sort | electron electron interactions and plasmon dispersion in graphene |
| url | http://hdl.handle.net/1721.1/88762 https://orcid.org/0000-0002-4268-731X |
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