Dynamic reorganization of vortex matter into partially disordered lattices

TL;DR

This study demonstrates how oscillatory forces can dynamically reorganize vortex matter in NbSe₂ into partially disordered lattices, revealing the link between vortex structure and pinning responses.

Contribution

It provides direct structural evidence of dynamic reorganization in vortex matter and clarifies the origin of intermediate pinning responses.

Findings

Oscillatory forces induce partially disordered vortex lattices.

Dynamic reorganization correlates with intermediate pinning responses.

Resolves debate on the origin of pinning behavior.

Abstract

We report structural evidence of dynamic reorganization in vortex matter in clean NbSe$_2$ by joint small angle neutron scattering and ac-susceptibility measurements. The application of oscillatory forces in a transitional region near the order-disorder transition results in robust bulk vortex lattice configurations with an intermediate degree of disorder. These dynamically-originated configurations correlate with intermediate pinning responses previously observed, resolving a long standing debate regarding the origin of such responses.