Magnetic field induced two-channel Kondo effect in multiple quantum dots

TL;DR

This paper investigates how magnetic fields can induce and stabilize the two-channel Kondo effect in multiple quantum dot systems, providing predictions for conductance behavior near quantum critical points.

Contribution

It demonstrates that tuning coupling parameters and applying magnetic fields can stabilize the two-channel Kondo critical point in quantum dot heterostructures.

Findings

Magnetic field can induce the two-channel Kondo effect.

Predicted scaling behavior of differential conductance near critical point.

Guidelines for experimental observation of the effect.

Abstract

We study the possibility to observe the two channel Kondo physics in multiple quantum dot heterostructures in the presence of magnetic field. We show that a fine tuning of the coupling parameters of the system and an external magnetic field may stabilize the two channel Kondo critical point. We make predictions for behavior of the scaling of the differential conductance in the vicinity of the quantum critical point, as a function of magnetic field, temperature and source-drain potential.