Pairing and Collective Excitations in Ising Superconductors

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...

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Veröffentlicht in:	JETP letters 2024, Vol.119 (1), p.46-52
1. Verfasser:	Semenov, A. G.
Format:	Artikel
Sprache:	eng
Schlagworte:	Atomic Biological and Medical Physics Biophysics Condensed Matter Ising model Molecular Optical and Plasma Physics Order parameters Particle and Nuclear Physics Physics Physics and Astronomy Quantum Information Technology Solid State Physics Spintronics Superconductivity Superconductors Transition metal compounds
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Zusammenfassung:	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.
ISSN:	0021-3640 1090-6487
DOI:	10.1134/S0021364023603810