Interplay between Vorticity and Chirality inside the Vortex Core in Chiral p-Wave Superconductors

TL;DR

This paper investigates how vorticity and chirality interact within vortex cores of chiral p-wave superconductors, focusing on nuclear spin relaxation rates and their dependence on magnetic field orientation and anisotropy.

Contribution

It provides a theoretical analysis of site-selective nuclear spin-lattice relaxation in vortex cores, highlighting the influence of chirality, magnetic field tilt, and anisotropy in chiral p-wave superconductors.

Findings

T1^{-1} depends on chirality relative to magnetic field

Magnetic field tilt affects relaxation rates

Anisotropy influences vortex core properties

Abstract

The vortex core in chiral p-wave superconductors exhibits various properties owing to the interplay between the vorticity and chirality inside the vortex core. In the chiral p-wave superconductors, the site-selective nuclear spin-lattice relaxation rate T1^{-1} is theoretically studied inside the vortex core within the framework of the quasiclassical theory of superconductivity. T1^{-1} at the vortex center depends on the sense of the chirality relative to the sense of the magnetic field. The effect of a tilt of the magnetic field upon T1^{-1} is investigated. The effect of the anisotropy in the superconducting gap and the Fermi surface is then investigated. The result is expected to be experimentally observed as a sign of the chiral pairing state in a superconducting material Sr2RuO4.