# Coupled electron and phonon transport in one-dimensional atomic junctions

## TL;DR

This paper presents a quantum mechanical model using nonequilibrium Green's functions to analyze coupled electron-phonon transport in one-dimensional atomic junctions, highlighting the importance of phonons in heat dissipation.

## Contribution

It introduces a fully quantum model for coupled electron-phonon transport in atomic junctions, enabling simultaneous analysis of electronic and phononic currents.

## Key findings

- Phonon transport significantly affects heat dissipation.
- The model conserves energy current within the self-consistent Born approximation.
- Coupled transport influences temperature changes in atomic junctions.

## Abstract

Employing the nonequilibrium Green's function method, we develop a fully quantum mechanical model to study the coupled electron-phonon transport in one-dimensional atomic junctions in the presence of a weak electron-phonon interaction. This model enables us to study the electronic and phononic transport on an equal footing. We derive the electrical and energy currents of the coupled electron-phonon system and the energy exchange between them. As an application, we study the heat dissipation in current carrying atomic junctions within the self-consistent Born approximation, which guarantees energy current conservation. We find that the inclusion of phonon transport is important in determining the heat dissipation and temperature change of the atomic junctions.