# Shot noise in Weyl semimetals

## TL;DR

This paper investigates how inelastic processes influence shot noise and magneto-transport in Weyl semimetals, revealing a crossover to ballistic behavior dominated by the chiral anomaly and proposing a method to estimate inelastic length via noise measurements.

## Contribution

It introduces a modified Boltzmann-Langevin approach to analyze shot noise in Weyl semimetals, highlighting the impact of inelastic collisions on current fluctuations under magnetic fields.

## Key findings

- Inelastic collisions alter the magnetic field dependence of shot noise.
- A crossover to ballistic regime occurs under strong magnetic fields.
- Shot noise measurements can estimate the electron-electron inelastic length.

## Abstract

We study the effect of inelastic processes on the magneto-transport of a quasi-one dimensional Weyl semi-metal, using a modified Boltzmann-Langevin approach. The magnetic field drives a crossover to a ballistic regime in which the propagation along the wire is dominated by the chiral anomaly, and the role of fluctuations inside the sample is exponentially suppressed. We show that inelastic collisions modify the parametric dependence of the current fluctuations on the magnetic field. By measuring shot noise as a function of a magnetic field, for different applied voltage, one can estimate the electron-electron inelastic length $l_{\rm ee}$.