Quasiparticle States near the Surface and the Domain Wall in a p_x \pm i p_y-Wave Superconductor

TL;DR

This paper investigates the electronic quasiparticle states near surfaces and domain walls in a p_x ± i p_y-wave superconductor, relevant to Sr_2 Ru O_4, revealing magnetic field behaviors consistent with experimental observations.

Contribution

It provides a theoretical analysis of surface and domain wall states in p_x ± i p_y-wave superconductors, highlighting their magnetic properties and relation to experimental data.

Findings

Magnetic field induced by the p_x ± i p_y pairing state matches experimental μSR data.

Surface and domain wall states exhibit unique quasiparticle characteristics.

Time reversal symmetry breaking leads to observable magnetic phenomena.

Abstract

The electronic states near a surface or a domain wall in the p_x \pm i p_y -wave superconductor are studied. This state has been recently suggested as the superconducting state of Sr_2 Ru O_4. The p_x \pm i p_y-wave paring state breaks the time reversal symmetry and induces a magnetic field. The obtained temperature dependence of the magnetic field is consistent with the observed \mu SR data.