Nematic superconductivity stabilized by density wave fluctuations: Possible application to twisted bilayer graphene
Name
PhysRevB.99.144507.pdf
Description
Published version
Size
375.25 KB
Format
Adobe PDF
Checksum (MD5)
493f2ec5b3fec9cfb47cd790558a156f
Author(s)
Kozii, Vladyslav
Isobe, Hiroki
Venderbos, Jörn WF
Fu, Liang
Date Issued
2019
Journal
Physical Review B
Publisher
American Physical Society (APS)
Version
Final published version
Abstract
© 2019 American Physical Society. Nematic superconductors possess unconventional superconducting order parameters that spontaneously break rotational symmetry of the underlying crystal. In this work we propose a mechanism for nematic superconductivity stabilized by strong density wave fluctuations in two dimensions. While the weak-coupling theory finds the fully gapped chiral state to be energetically stable, we show that strong density wave fluctuations result in an additional contribution to the free energy of a superconductor with multicomponent order parameters, which generally favors nematic superconductivity. Our theory sheds light on the recent observation of rotational symmetry breaking in the superconducting state of twisted bilayer graphene.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
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.99.144507
