Suppression of current in transport through parallel double quantum dots

TL;DR

This paper investigates how the conductance in a double quantum dot system is suppressed at low temperatures and biases due to Kondo scattering, revealing a zero-bias anomaly.

Contribution

It provides a detailed analysis of conductance suppression caused by Kondo effects in parallel double quantum dots with one in the Kondo regime.

Findings

Conductance is suppressed at low temperatures and biases.

Zero-bias anomaly observed due to enhanced Kondo scattering.

Kondo scattering off the side-connected dot influences transport properties.

Abstract

We report our study of the I-V curves in the transport through the quantum dot when an additional quantum dot lying in the Kondo regime is side-connected to it. Due to the Kondo scattering off the effective spin on a side-connected quantum dot the conductance is suppressed at low temperatures and at low source-drain bias voltages. This zero-bias anomaly is understood as enhanced Kondo scattering with decreasing temperature.