Electromagnetic response of cuprate superconductors with coexisting electronic nematicity

TL;DR

This paper investigates how electronic nematicity influences the electromagnetic response in cuprate superconductors, revealing anisotropic effects and the coexistence of s-wave and d-wave superconducting gaps, which affect superconducting properties.

Contribution

It introduces a framework showing the impact of nematic order strength on electromagnetic response and superconducting gap components in cuprates, highlighting a dome-shaped dependence of superfluid density.

Findings

Nematicity causes significant anisotropy in electromagnetic response.

Electronic nematicity induces coexistence of s-wave and d-wave gaps.

Superfluid density exhibits a dome-like dependence on nematic order strength.

Abstract

The electronically nematic order has emerged as a key feature of cuprate superconductors,however, its correlation with the fundamental properties such as the electromagnetic response remains unclear. Here the nematic-order state strength dependence of the electromagnetic response in cuprate superconductors is investigated within the framework of the kinetic-energy-driven superconductivity. It is shown that a significant anisotropy of the electromagnetic response is caused by the electronic nematicity. In particular, in addition to the pure d-wave component of the superconducting gap, the pure s-wave component of the superconducting gap is generated by the electronic nematicity, therefore there is a coexistence and competition of the d-wave component and the s-wave component. This coexistence and competition leads to that the maximal condensation energy appears at around the optimal strength of the electronic nematicity, and then decreases in both the weak and strong strength regions, which in turn induces the enhancement of superconductivity, and gives rise to the dome-like shape of the nematic-order state strength dependence of the superfluid density.