Depairing field, onset temperature and the nature of the transition in cuprates

TL;DR

This paper investigates the depairing field and transition nature in hole-doped cuprates using high-field magnetization measurements, providing insights into pairing energy, fluctuations, and the superconducting transition.

Contribution

It offers new experimental insights into the upper critical field and transition characteristics of cuprates through torque magnetometry data analysis.

Findings

Depairing field $H_{c2}$ measured up to 45 T.

Implications for pair binding energy and Nernst onset temperature.

Insights into the nature of the Meissner transition at $T_c$.

Abstract

The depairing (upper critical) field $H_{c2}$ in hole-doped cuprates has been inferred from magnetization curves $M$-$H$ measured by torque magnetometry in fields $H$ up to 45 T. We discuss the implications of the results for the pair binding energy, the Nernst onset temperature, fluctuations and the nature of the Meissner transition at $T_c$.