Spin susceptibility of nonunitary spin-triplet superconductors
Thomas Bernat, Julia S. Meyer, and Manuel Houzet
TL;DR
This paper derives a formula for the spin susceptibility of nonunitary triplet superconductors, aiding the identification of their order parameter symmetry and evaluating experimental claims of nonunitary triplet pairing in materials.
Contribution
It provides a general theoretical formula for spin susceptibility in nonunitary triplet superconductors considering strong spin-orbit coupling.
Findings
Derived a universal formula for spin susceptibility.
Critically assessed experimental claims of nonunitary triplet superconductivity.
Applied the formula to specific material cases.
Abstract
The spin susceptibility is an important probe to characterize the symmetry of the order parameter in unconventional superconductors. Among them, nonunitary triplet superconductors have attracted a lot of attention recently in the context of the search for topological superconductivity. Here, we derive a general formula for the spin susceptibility of nonunitary triplet superconductors within a single-band model of non-magnetic, centrosymmetric materials with strong spin-orbit coupling. We use it to critically assess experimental claims of nonunitary triplet superconductivity in some materials.
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Taxonomy
TopicsIron-based superconductors research · Rare-earth and actinide compounds · Physics of Superconductivity and Magnetism