Comment on "Universality of the 1/3 shot-noise suppression factor in nondegenerate diffusive conductors"

TL;DR

This paper critiques a recent claim about shot noise suppression in nondegenerate diffusive conductors, attributing the observed effect to a specific assumption about scattering time rather than a universal phenomenon.

Contribution

It challenges the universality of the 1/3 shot-noise suppression factor by highlighting the role of energy-independent elastic scattering time in previous results.

Findings

The 1/3 suppression is not universal but depends on specific scattering assumptions.

Energy-dependent scattering times may alter shot noise suppression levels.

The previous results are influenced by the choice of scattering time model.

Abstract

We argue that the nearly 1/3 suppression of shot noise in nondegenerate diffusive contacts recently obtained by Gonzalez et al. (cond-mat/9803372) is due to the specific choice of the energy-independent elastic scattering time.