Enhancement of Superconductivity near a Nematic Quantum Critical Point

S. Lederer, Y. Schattner, E. Berg, and S. A. Kivelson
Phys. Rev. Lett. 114, 097001 – Published 2 March 2015
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Abstract

We consider a low Tc metallic superconductor weakly coupled to the soft fluctuations associated with proximity to a nematic quantum critical point (NQCP). We show that (1) a BCS-Eliashberg treatment remains valid outside of a parametrically narrow interval about the NQCP, (2) the symmetry of the superconducting state (d wave, s wave, p wave) is typically determined by the noncritical interactions, but Tc is enhanced by the nematic fluctuations in all channels, and (3) in 2D, this enhancement grows upon approach to criticality up to the point at which the weak coupling approach breaks down, but in 3D, the enhancement is much weaker.

  • Figure
  • Received 12 June 2014

DOI:https://doi.org/10.1103/PhysRevLett.114.097001

© 2015 American Physical Society

Authors & Affiliations

S. Lederer1, Y. Schattner2, E. Berg2, and S. A. Kivelson1

  • 1Department of Physics, Stanford University, Stanford, California 94305, USA
  • 2Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel

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Issue

Vol. 114, Iss. 9 — 6 March 2015

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