# Fingerprints of Majorana fermions in current-correlations measurements from a superconducting tunnel microscope

## TL;DR

This paper analyzes current correlation functions in a topological nanowire system to identify signatures of Majorana bound states, highlighting distinctive spin-resolved correlation patterns compared to Andreev states.

## Contribution

It introduces a method to detect Majorana fermions via spin-resolved current correlations in a superconducting tunnel microscope, providing clear experimental signatures.

## Key findings

- Negative spin-resolved cross-correlations indicate Majorana states.
- Positive correlations are associated with Andreev bound states.
- Robustness of signatures at finite temperature is discussed.

## Abstract

We compute various current correlation functions of electrons flowing from a topological nanowire to the tip of a superconducting scanning tunnel microscope and identify fingerprints of a Majorana bound state. In particular, the spin resolved cross-correlations are shown to display a clear distinction between the presence of a such an exotic state (negative correlations) and an Andreev bound state (positive correlations). Similarity and differences with measurements with a normal tunnel microscope are also discussed, like the robustness to finite temperature for instance.