Thermal dependence of the zero-bias conductance through a nanostructure

TL;DR

This paper demonstrates that the zero-bias conductance in a quantum wire with a side-coupled quantum dot exhibits universal temperature dependence, applicable even with interference effects, and validates this with experimental data.

Contribution

It reveals the universal temperature dependence of conductance in a quantum dot-wire system, extending understanding despite interference effects, and applies the theory to experimental results.

Findings

Conductance is a universal function of temperature.

Universality holds even with interference effects.

Experimental data confirms the theoretical prediction.

Abstract

We show that the conductance of a quantum wire side-coupled to a quantum dot, with a gate potential favoring the formation of a dot magnetic moment, is a universal function of the temperature. Universality prevails even if the currents through the dot and the wire interfere. We apply this result to the experimental data of Sato et al.[Phys. Rev. Lett. 95, 066801 (2005)].