Josephson Plasma Resonance as a Structural Probe of Vortex Liquid

TL;DR

This paper introduces a method to use Josephson plasma resonance measurements to probe the structure of vortex liquids in layered high-temperature superconductors, linking plasma resonance data to vortex density correlations.

Contribution

It derives a relation connecting Josephson coupling energy with vortex density correlations, enabling structural analysis of vortex liquids through plasma resonance.

Findings

Derived a relation between Josephson coupling energy and vortex density correlations.

Proposed a method to extract vortex structure from plasma resonance dependence.

Provides a new tool for studying vortex phases in high-Tc superconductors.

Abstract

Recent developments of the Josephson plasma resonance and transport c-axis measurements in layered high T$_{c}$ superconductors allow to probe Josephson coupling in a wide range of the vortex phase diagram. We derive a relation between the field dependent Josephson coupling energy and the density correlation function of the vortex liquid. This relation provides a unique opportunity to extract the density correlation function of pancake vortices from the dependence of the plasma resonance on the $ab$-component of the magnetic field at a fixed $c$-axis component.