Thermal-Hall conductivity and long-lived quasiparticles in CeCoIn$_5$

TL;DR

This paper investigates the thermal and Hall conductivities in CeCoIn$_5$ below its critical temperature, revealing long-lived quasiparticles and field-dependent heat currents through experimental anomalies and suppression effects.

Contribution

It provides new insights into quasiparticle dynamics and heat transport mechanisms in CeCoIn$_5$ by analyzing conductivity anomalies and field effects.

Findings

Large anomalies in thermal and Hall conductivities below T_c

Suppression of anomalies in weak magnetic fields

Evidence for long-lived quasiparticles

Abstract

In CeCoIn$_5$, the thermal conductivity $\kappa_{xx}$ and Hall conductivity $\kappa_{xy}$ below $T_c$ display large anomalies below $T_c$. The strong suppression of the anomalies in weak fields implies the existence of long-lived quasiparticles. We also discuss briefly the Wiedemann-Franz ratio and the existence of a strongly field-dependent spin-fluctuation heat current.