Mass of Abrikosov vortex in high-temperature superconductor YBaCuO

TL;DR

This paper reports the first experimental detection of the mass of Abrikosov vortices in high-temperature superconductor YBaCuO using circular dichroism in magneto-transmittance measurements, confirming theoretical predictions.

Contribution

It introduces a novel method to detect vortex mass in high-temperature superconductors through circular dichroism measurements, providing quantitative values for vortex mass.

Findings

Vortex mass in YBaCuO is approximately 2.2 x 10^8 electron masses per centimeter at 45 K.

Circular dichroism increases as temperature decreases below the superconducting transition.

Results support the role of quasiparticle states in the vortex core.

Abstract

Mass of Abrikosov vortices defied experimental observation for more than four decades. We demonstrate a method of its detection in high-temperature superconductors. Similarly to electrons, fluxons circulate in the direction given by the magnetic field, causing circular dichroism. We report the magneto-transmittance of a nearly optimally doped thin YBaCuO film, measured using circularly polarized submillimeter waves. The circular dichroism emerges in the superconducting state and increases with dropping temperature. Our results confirm the dominant role of quasiparticle states in the vortex core and yield the diagonal fluxon mass of 2.2 x 10^8 electron masses per centimeter at 45 K and zero-frequency limit and even larger off-diagonal mass of 4.9 x 10^8 electron masses per centimeter.