This article is cited in 2 papers

CONDENSED MATTER

Pairing and collective excitations in Ising superconductors

A. G. Semenov<sup>ab

a</sup> Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991 Russia
^b Skolkovo Institute of Science and Technologies, Moscow, 121205 Russia

Abstract: Two-dimensional Ising superconductivity formed in NbSe$_2$, MoS$_2$, WS$_2$, etc. transition-metal dichalcogenides is considered. For the superconducting state, the effective low-energy action for phases of the order parameters has been obtained and collective modes in the system have been studied. It has been shown that the system contains not only the Goldstone mode but also the Leggett mode with a mass related to the difference between the singlet and triplet pairing constants. The effect of a low magnetic field parallel to the plane of the system has also been discussed.

Received: 17.11.2023
Revised: 17.11.2023
Accepted: 24.11.2023

DOI: 10.31857/S1234567824010099

 English version: Journal of Experimental and Theoretical Physics Letters, 2024, 119:1, 46–52