Designing phase-sensitive tests for Fe-based superconductors

TL;DR

This paper proposes novel experimental methods using tunnel junctions and point contacts to determine pairing symmetry in multiband Fe-based superconductors, facilitating accessible testing with current fabrication techniques.

Contribution

It introduces new phase-sensitive test designs specifically tailored for Fe-based superconductors, advancing experimental capabilities.

Findings

Designs are feasible with existing fabrication methods.

Tests can distinguish different pairing symmetries.

Approach enhances understanding of superconducting pairing mechanisms.

Abstract

We suggest new experimental designs suitable to test pairing symmetry in multiband Fe-based superconductors. These designs are based on combinations of tunnel junctions and point contacts and should be accessible by existing sample fabrication techniques.