Josephson Effect Between Triplet Superconductors: A Self-Test for the Order Parameter Symmetry of Bechgaard Salts

TL;DR

This paper investigates how the Josephson effect between triplet superconductors depends on their orientation and symmetry, proposing it as a test for identifying the order parameter symmetry in Bechgaard salts.

Contribution

It introduces a method to distinguish order parameter symmetries in triplet superconductors using Josephson effect measurements, considering tunneling processes and surface states.

Findings

Josephson effect varies with d-vector orientation

Temperature and angular dependence reveal symmetry differences

Surface bound states influence tunneling characteristics

Abstract

We show that the Josephson effect between triplet superconductors is sensitive to the relative orientation of the d-vectors across the junction. In addition, we point out that the temperature and angular dependence of the Josephson effect can help distinguish between different order parameter symmetries. We discuss coherent and incoherent tunneling processes, and the role of surface bound states within the framework of non-local lattice Bogoliubov-deGennes equations.