Mechanisms of in-plane magnetic anisotropy in superconducting NbSe2

Menashe Haim, Alex Levchenko, Maxim Khodas

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We present a unifying picture of the magnetic in-plane anisotropies of two-dimensional superconductors based on transition metal dichalcogenides. The symmetry considerations are first applied to constrain the form of the conductivity tensor. We hence conclude that the twofold periodicity of transport distinct from the planar Hall-related contributions requires a tensor perturbation. At the same time, the sixfold periodic variation of the critical field results from the Rashba spin-orbit coupling on a hexagonal lattice. We have considered the effect of a weak tensor perturbation on the critical field, gap function, and magnetoconductivity. The latter is studied using the time-dependent Ginzburg-Landau phenomenology. The common origin of the π periodicity in transport and thermodynamics properties is identified. The scheme constructed here is applied to describe the existing theoretical scenarios from a unified point of view. This allows us to single out the differences and similarities between the suggested approaches.

Original languageAmerican English
Article number024515
JournalPhysical Review B
Volume105
Issue number2
DOIs
StatePublished - 1 Jan 2022

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© 2022 American Physical Society.

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