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arXiv · 1406.1193

Enhancement of superconductivity near a nematic quantum critical point

Samuel Lederer·Yonatan Schattner·Erez Berg·Steven A. Kivelson
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Abstract

We consider a low $T_c$ 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 non-critical interactions, but $T_c$ is enhanced by the nematic fluctuations in all channels; 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.

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Samuel Lederer, Yonatan Schattner, Erez Berg, Steven A. Kivelson. 2014-06-04. Enhancement of superconductivity near a nematic quantum critical point. https://doi.org/10.1103/physrevlett.114.097001

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