Conductance of d-wave superconductor/normal metal/d-wave superconductor junctions

TL;DR

This paper develops a theoretical model for the conductance of d-wave superconductor/normal metal/superconductor junctions, revealing that at low temperatures, conductance is significantly enhanced due to the d-wave symmetry and inelastic relaxation processes.

Contribution

It introduces a new theory specifically for d-wave superconductor junctions, highlighting the impact of order parameter symmetry on conductance at low temperatures.

Findings

Conductance is proportional to the square root of inelastic relaxation time.

Conductance exceeds that of the normal metal part at low temperatures.

Theoretical prediction of enhanced conductance due to d-wave symmetry.

Abstract

We develop a theory of the conductance of superconductor/normal metal/superconductor junctions in the case where the superconducting order parameter has d-wave symmetry. At low temperature the conductance is proportional to the square root of the inelastic electron relaxation time in the bulk of the superconductor. As a result it turns out to be much larger than the conductance of the normal part of the junction.