Light-induced d-wave superconductivity through Floquet-engineered Fermi surfaces in cuprates

TL;DR

This paper proposes a method to use high-frequency light to modify the Fermi surface in cuprates, enhancing d-wave superconductivity by dynamically shifting the balance of electronic instabilities.

Contribution

It introduces a Floquet engineering approach to control Fermi surface topology and superconducting tendencies in correlated materials, specifically demonstrating enhancement of d-wave pairing in cuprates.

Findings

Light deforms the Fermi surface near van-Hove singularities.

Enhanced d-wave superconductivity observed under light irradiation.

Extended regions of superconductivity in the phase diagram due to Floquet effects.

Abstract

We introduce a mechanism for light-induced Floquet engineering of the Fermi surface to dynamically tip the balance between competing instabilities in correlated condensed matter systems in the vicinity of a van-Hove singularity. We first calculate how the Fermi surface is deformed by an off-resonant, high-frequency light field and then determine the impact of this deformation on the ordering tendencies using an unbiased functional renormalization group approach. As a testbed, we investigate Floquet engineering in cuprates driven by light. We find that the $d$-wave superconducting ordering tendency in this system can be strongly enhanced over the Mott insulating one. This gives rise to extended regions of induced $d$-wave superconductivity in the effective phase diagram in the presence of a light field.