Multiple optical gaps and laser with magnonic pumping in 2D Ising superconductors

TL;DR

This paper explores the unique optical properties of 2D Ising superconductors, revealing multiple optical gaps and proposing a superconducting laser driven by magnonic pumping enabled by in-plane Zeeman fields.

Contribution

It uncovers the optical gaps and demonstrates the potential for a superconducting laser using magnonic pumping in 2D Ising superconductors, a novel application of their properties.

Findings

Identification of multiple optical gaps in conductivity and Raman susceptibility.

Demonstration of strong population inversion via Zeeman field in Bogolubov quasiparticles.

Proposal of a superconducting laser with magnonic pumping in van der Waals heterostructures.

Abstract

Ising superconductivity has been recently discovered in 2D transition metal dichalcogenides. We report that such superconductors have unusual optical properties controlled by the in-plane Zeeman field. First, we find several optical gaps visible as peaks of the conductivity and the Raman susceptibility. Moreover, we find that the Ising spin splitting in the spectrum of Bogolubov quasiparticles enables strong population inversion generated by the time-dependent Zeeman field. Ultimately this leads to the possibility of the superconducting laser with magnonic pumping which can be realized in the van der Waals structures consisting of the Ising superconductor and the ferromagnetic insulator layers.