Shrinking Magnetic Vortices in V3Si Due to Delocalized Quasiparticle Core States: Confirmation of the Microscopic Theory for Interacting Vortices

TL;DR

This study uses muon spin rotation to confirm microscopic theories predicting that delocalized quasiparticle core states alter the vortex structure in V3Si, enhancing understanding of vortex interactions in superconductors.

Contribution

The paper provides experimental confirmation of theoretical predictions regarding vortex core state delocalization and its impact on vortex structure in a conventional superconductor.

Findings

Evidence of vortex core structure changes due to quasiparticle delocalization

Confirmation of microscopic theories on vortex interactions

Insights into vortex behavior in applied magnetic fields

Abstract

We report muon spin rotation measurements on the conventional type-II superconductor V3Si that provide clear evidence for changes to the inner structure of a vortex due to the delocalization of bound quasiparticle core states. The experimental findings described here confirm a key prediction of recent microscopic theories describing interacting vortices. The effects of vortex-vortex interactions on the magnetic and electronic structure of the vortex state are of crucial importance to the interpretation of experiments on both conventional and exotic superconductors in an applied magnetic field.