Tc for heavy Fermion superconductors linked with other physical properties at zero and applied pressure

TL;DR

This paper explores how the superconducting transition temperature in heavy Fermion materials relates to properties like electrical conductivity and relaxation time, under various pressures, to deepen understanding of their superconducting behavior.

Contribution

It introduces the correlation of Tc with dc electrical conductivity and relaxation time, and examines pressure effects on these properties in heavy Fermion superconductors.

Findings

Tc correlates with dc electrical conductivity at Tc

Pressure influences both Tc and sigma(Tc) in heavy Fermion materials

Relaxation time at Tc approaches an uncertainty principle limit

Abstract

The superconducting transition temperature Tc has earlier been correlated with coherence length and effective mass for a series of heavy Fermion (HF) materials at atmospheric pressure. Here, a further physical property, the dc electrical conductivity sigma(Tc), is one focal point, another being the pressure dependence of both Tc and sigma(Tc) for several HF materials. The relaxation time tau(Tc) is also studied in relation to an Uncertainty Principle limit, involving only the thermal energy kB Tc and Planck's constant.