The Bose-glass phase in twinned YBaCuO(123)

TL;DR

This study experimentally investigates the Bose-glass to liquid transition in twinned YBaCuO(123) crystals, revealing a change in universality class and determining a new dynamical critical exponent when magnetic fields are applied at small angles.

Contribution

It provides the first experimental evidence of a change in the universality class of the Bose-glass transition in high-temperature superconductors with tilted magnetic fields.

Findings

Identified a change in the universality class of the transition.

Measured a new dynamical critical exponent s'=1.1 +/-0.2.

Confirmed theoretical predictions about the transition behavior.

Abstract

Using an extensive scaling analysis of the transport properties in twinned YBaCuO(123) crystals we have experimentally found the predicted change in the universality class of the Bose-glass to liquid transition when the magnetic field is applied at small angles away from the direction of the correlated defects. The new dynamical critical exponent is s'=1.1 +/-0.2.