Subdominant interactions and Hc2 in UBe13

TL;DR

This paper proposes a model involving field-induced mixing of odd-parity representations to explain the unusual temperature dependence of the upper critical field in UBe13, comparing predictions with experimental data and existing theories.

Contribution

It introduces a novel model based on field-induced mixing of odd-parity representations to explain Hc2(T) in UBe13, advancing understanding of its unconventional superconductivity.

Findings

Model explains unusual Hc2(T) features in UBe13

Predictions align with recent pressure measurements

Comparison with existing theories highlights new insights

Abstract

We discuss a model based on a field-induced mixture of two odd-parity irreducible representations to explain the unusual features of Hc2(T) in the heavy fermion compound UBe13. We compare its predictions with recent pressure measurements as well as with the most prominent theoretical models which have been proposed up to now.