Interplay of superconductivity and spin-density-wave order in doped graphene
Name
Nandkishore-2012-Interplay of superconductivity and spin-density-wave order.pdf
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Author(s)
Chubukov, Andrey V.
Nandkishore, Rahul Mahajan
Date Issued
September 2012
Journal
Physical Review B
Publisher
American Physical Society
Citation
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
Version
Final published version
Abstract
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.
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/PhysRevB.86.115426
