Phonon-assisted tunneling through a double quantum dot system

TL;DR

This paper investigates how electron-phonon interactions affect electron transport in a double quantum dot system, revealing temperature-dependent features in conductance and current using nonequilibrium Green function methods.

Contribution

It provides a detailed analysis of phonon-assisted tunneling effects on transport properties in double quantum dots, incorporating temperature and interaction influences.

Findings

Side peaks in conductance appear at low temperatures due to electron-phonon interaction.

High temperatures cause the disappearance of phonon-related conductance features.

Electron-phonon interaction modifies the density of states and current in the system.

Abstract

Electron transport through a double quantum dot system is studied with taking into account electron-phonon interaction. The Keldysh nonequilibrium Green function formalism is used to compute the current and transmission coefficient of the system. The influence of the electron-phonon interaction, interdot tunneling, and temperature on the density of states and current is analyzed. Results show that although the electron-phonon interaction results in the appearance of side peaks in the conductance at low temperatures, they are disappeared in high temperatures.