# Shot Noise as a probe for the pairing symmetry of Iron pnictide superconductors

## TL;DR

This paper investigates the pairing symmetry of Iron pnictide superconductors using Andreev conductance and shot noise measurements, providing a method to distinguish between s++ and s± pairing symmetries.

## Contribution

It introduces a novel approach employing shot noise and conductance to differentiate pairing symmetries in Iron pnictides.

## Key findings

- Distinct zero bias conductance signatures for s++ and s± pairing
- Shot noise differences enable effective pairing symmetry identification
- Provides a practical experimental method for superconductor characterization

## Abstract

One of the outstanding problems in Iron pnictide research is the unambiguous detection of its pairing symmetry. The most probable candidates are the two-band s$++$ and sign reversed s$\pm$ wave pairing. In this work, the Andreev conductance and shot noise are used as a probe for the pairing symmetry of Iron pnictide superconductors. Clear differences emerge in both the zero bias differential conductance and the shot noise in the tunneling limit for the two cases enabling an effective distinction between the two.