Ising superconductivity

S.G. Ovchinnikov^†
Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Academgorodok 50, str. 38, Krasnoyarsk, 660036, Russian Federation

We consider experimental and theoretical studies of Ising superconductivity. This new field in the physics of superconductivity was given impetus by the discovery of unusual properties in layered molybdenum disulfide (MoS₂) exhibiting an unprecedentedly high upper critical magnetic field B_c2, exceeding the paramagnetic Pauli limit six fold. It turns out that this is due to the properties of the crystal lattice of two-dimensional monolayers inducing Ising and Rashba spin—orbit coupling. Features of the crystal structure lead to a possible coexistence of singlet and triplet pairing and to the emergence of topological phases. Some options for searching for the Majorana fermion formations at the ends of long one-dimensional wires on the surface of an Ising superconductor are discussed.

Keywords: layered structures with triangular layers, Ising spin—orbit coupling, Rashba spin—orbit coupling, singlet and triplet Cooper pairs, topological states
PACS: 74.78.−w
DOI: 10.3367/UFNe.2024.06.039696
URL: https://ufn.ru/en/articles/2025/6/a/
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001570951300001
Scopus

2-s2.0-105011866839
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2025PhyU...68..537O
Citation: Ovchinnikov S G "Ising superconductivity" Phys. Usp. 68 537–550 (2025)

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Received: 15th, May 2024, revised: 20th, June 2024, accepted: 22nd, June 2024

Оригинал: Овчинников С Г «Изинговская сверхпроводимость» УФН 195 569–583 (2025); DOI: 10.3367/UFNr.2024.06.039696

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