Electron spectroscopy of the shot noise reduction effect

TL;DR

This paper derives a formula for current noise in ballistic conductors considering Coulomb correlations, revealing how energy-dependent transport influences noise reduction and proposing an experiment to probe these effects.

Contribution

It introduces a general formula for current noise in ballistic conductors that accounts for Coulomb correlations and suggests an electron energy spectroscopy experiment.

Findings

Derived a comprehensive noise formula considering Coulomb interactions.

Identified how energy groups contribute to noise reduction.

Proposed an experimental method to investigate Coulomb correlations.

Abstract

A general formula for current noise in a two-terminal ballistic nondegenerate conductor under the action of long-range Coulomb correlations has been derived. The noise reduction factor (in respect to the uncorrelated value) is obtained for biases ranging from thermal to shot noise limits, and it is related to spatial variations in transport characteristics. The contributions of different energy groups of carriers to the noise are found, that leads us to suggest an electron energy spectroscopy experiment to probe the Coulomb correlations in ballistic conductors.