Thermal conductivity in B- and C- phase of UPt_3

TL;DR

This paper investigates the nodal structure of UPt_3's B and C phases by analyzing the angular dependence of magnetothermal conductivity at low temperatures using semiclassical methods, aiming to clarify longstanding questions.

Contribution

It applies Volovik's semiclassical approach to study magnetothermal conductivity in UPt_3, providing new insights into its nodal directions in different phases.

Findings

Angular dependence reveals nodal directions in UPt_3

Magnetothermal conductivity varies with magnetic field orientation

Results help clarify the superconducting gap structure

Abstract

Although the superconductivity in UPt_3 is one of the most well studied, there are still lingering questions about the nodal directions in the B and C phase in the presence of a magnetic field. Limiting ourselves to the low temperature regime (T<<Delta(0)), we study the magnetothermal conductivity with in semiclassical approximation using Volovik's approach. The angular dependence of the magnetothermal conductivity for an arbitrary field direction should clarify the nodal structure in UPt_3.