Remarkable suppression of Josephson current on d-wave superconductor junction

TL;DR

This paper investigates the suppression of Josephson current in d-wave superconductor junctions, highlighting how the imaginary component of the pair potential at the interface leads to significant current suppression.

Contribution

It introduces a theoretical analysis of how the imaginary part of the pair potential at the interface causes remarkable suppression of Josephson current in d-wave superconductor junctions.

Findings

Josephson current is suppressed at low temperatures in d-wave superconductor junctions.

The imaginary component of the pair potential at the interface plays a key role in current suppression.

Suppression is particularly notable in 110-oriented junctions.

Abstract

Josephson current in superconductor/insulator/superconductor junction is studied theoretically. It is well known that when the zero-energy resonance state exists both side of superconducting interface, the behaver of the temperature dependence of the critical Josephson current is striking enhancement at low temperature. On the other hand it is reported that if $d+is$-wave exists at the interface, Josephson current is suppressed at low temperature. In this paper, we discuss the existence of the imaginary part of the pair potential at the interface and remarkable suppresses of dc Josephson current on d-wave superconductor 110-junction.