Sweeping reciprocal vortex lattice across the Fermi surface: A new magnetoquantum oscillations effect in the superconducting state

TL;DR

This paper reveals a new magnetoquantum oscillations effect in the superconducting state caused by coherent vortex lattice scattering, which encodes vortex geometry and is sensitive to disorder, offering insights into vortex dynamics.

Contribution

It introduces a novel oscillation phenomenon linked to vortex lattice structure and disorder effects in superconductors, expanding understanding of vortex quasiparticle interactions.

Findings

Oscillations are critically enhanced by vortex lattice coherence.

The oscillation frequency reveals vortex lattice geometry.

Disorder suppresses the oscillatory component.

Abstract

It is shown that coherent scatterings by an ordered vortex lattice are critically enhanced for quasi particles moving in cyclotron orbits on the Fermi surface through vortex core regions, thus generating significant quasi-periodic oscillating contributions to the SC free energy as a function of the inverse magnetic field. The mean frequency of the oscillation provides a fingerprint of the vortex lattice geometry. Vortex-lattice disorder, tends to suppress this oscillatory component.