Model for Vortex-core tunneling spectroscopy of chiral p-wave superconductors via odd-frequency pairing states

TL;DR

This paper presents a theoretical model showing how odd-frequency pairing states induce a zero-energy peak in the local density of states at vortex cores in chiral p-wave superconductors, aiding experimental identification.

Contribution

It introduces a model linking odd-frequency pairing to vortex core LDOS features, providing a method to distinguish pairing symmetry and chiral domains.

Findings

Zero-energy LDOS peak caused by odd-omega s-wave pairing

Discrimination of spin-triplet pairing via tunneling spectroscopy

Insight into chiral-domain structures in superconductors

Abstract

The local density of states (LDOS) around a vortex core is studied theoretically in terms of the odd-frequency (odd-omega) Cooper pairing induced around the center of the vortex core. We find a robust zero-energy peak in the LDOS at a vortex core in a chiral p-wave superconductor originating from an odd-omega s-wave pair amplitude. We suggest how to discriminate a spin-triplet pairing symmetry and spatial chiral-domain structure by scanning tunneling spectroscopy via odd-omega pair amplitudes inside vortex cores.