Interplay of superconductivity and spin-density-wave order in doped graphene
We study the interplay between superconductivity and spin-density-wave order in graphene doped to 3/8 or 5/8 filling (a van Hove doping). At this doping level, the system is known to exhibit weak-coupling instabilities to both chiral d+id superconductivity and to a uniaxial spin density wave. Right...
| Main Authors: | , |
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/75440 |
| _version_ | 1826206416872931328 |
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| author | Chubukov, Andrey V. Nandkishore, Rahul Mahajan |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Chubukov, Andrey V. Nandkishore, Rahul Mahajan |
| author_sort | Chubukov, Andrey V. |
| collection | MIT |
| description | We study the interplay between superconductivity and spin-density-wave order in graphene doped to 3/8 or 5/8 filling (a van Hove doping). At this doping level, the system is known to exhibit weak-coupling instabilities to both chiral d+id superconductivity and to a uniaxial spin density wave. Right at van Hove doping, the superconducting instability is strongest and emerges at the highest Tc, but slightly away from van Hove doping, a spin density wave likely emerges first. We investigate whether at some lower temperature superconductivity and spin density waves coexist. We derive the Landau-Ginzburg functional describing interplay of the two order parameters. Our calculations show that superconductivity and spin-density-wave order do not coexist and are separated by first-order transitions, either as a function of doping or as a function of T. |
| first_indexed | 2024-09-23T13:29:08Z |
| format | Article |
| id | mit-1721.1/75440 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:29:08Z |
| publishDate | 2012 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/754402022-09-28T14:33:31Z Interplay of superconductivity and spin-density-wave order in doped graphene Chubukov, Andrey V. Nandkishore, Rahul Mahajan Massachusetts Institute of Technology. Department of Physics Nandkishore, Rahul Mahajan We study the interplay between superconductivity and spin-density-wave order in graphene doped to 3/8 or 5/8 filling (a van Hove doping). At this doping level, the system is known to exhibit weak-coupling instabilities to both chiral d+id superconductivity and to a uniaxial spin density wave. Right at van Hove doping, the superconducting instability is strongest and emerges at the highest Tc, but slightly away from van Hove doping, a spin density wave likely emerges first. We investigate whether at some lower temperature superconductivity and spin density waves coexist. We derive the Landau-Ginzburg functional describing interplay of the two order parameters. Our calculations show that superconductivity and spin-density-wave order do not coexist and are separated by first-order transitions, either as a function of doping or as a function of T. National Science Foundation (U.S.) (Grant NSFDMR- 0906953) 2012-12-12T21:15:17Z 2012-12-12T21:15:17Z 2012-09 2012-07 Article http://purl.org/eprint/type/JournalArticle 1098-0121 1550-235X http://hdl.handle.net/1721.1/75440 Nandkishore, Rahul, and Andrey Chubukov. “Interplay of Superconductivity and Spin-density-wave Order in Doped Graphene.” Physical Review B 86.11 (2012). ©2012 American Physical Society en_US http://dx.doi.org/10.1103/PhysRevB.86.115426 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 APS |
| spellingShingle | Chubukov, Andrey V. Nandkishore, Rahul Mahajan Interplay of superconductivity and spin-density-wave order in doped graphene |
| title | Interplay of superconductivity and spin-density-wave order in doped graphene |
| title_full | Interplay of superconductivity and spin-density-wave order in doped graphene |
| title_fullStr | Interplay of superconductivity and spin-density-wave order in doped graphene |
| title_full_unstemmed | Interplay of superconductivity and spin-density-wave order in doped graphene |
| title_short | Interplay of superconductivity and spin-density-wave order in doped graphene |
| title_sort | interplay of superconductivity and spin density wave order in doped graphene |
| url | http://hdl.handle.net/1721.1/75440 |
| work_keys_str_mv | AT chubukovandreyv interplayofsuperconductivityandspindensitywaveorderindopedgraphene AT nandkishorerahulmahajan interplayofsuperconductivityandspindensitywaveorderindopedgraphene |