Conductance Increase by Electron-Phonon Interaction in Quantum Wires

TL;DR

This paper studies how electron-phonon interactions affect the electrical conductance of quantum wires, revealing a slight increase in conductance due to many-body effects at zero temperature.

Contribution

It provides a theoretical calculation showing a Tomonaga-Luttinger-like renormalization of conductance in quantum wires caused by electron-phonon interactions.

Findings

Conductance is slightly increased above the quantum limit of 2e^2/h.

Renormalization effect is similar to Tomonaga-Luttinger liquids.

Results are relevant for realistic quantum wire models.

Abstract

We investigate the influence of electron-phonon interactions on the DC-conductance $\Gamma $ of a quantum wire in the limit of one occupied subband. At zero temperature, a Tomonaga-Luttinger-like renormalization of $\Gamma $ to a value slightly larger than $2e^{2}/h$ is calculated for a realistic quantum wire model.