Kondo effect in side coupled double quantum-dot molecule

TL;DR

This paper investigates the Kondo effect in a double quantum-dot molecule side-coupled to a quantum wire, revealing conductance cancelations and analyzing many-body Kondo states using a mean-field slave-boson approach.

Contribution

It introduces a detailed analysis of the molecular Kondo states in a double quantum-dot system with a novel focus on conductance cancelations.

Findings

Conductance cancelations occur when molecular energies cross the Fermi level.

The study characterizes many-body molecular Kondo states as system parameters vary.

The mean-field slave-boson formalism effectively models the Kondo regime in this system.

Abstract

Electron tunneling through a double quantum dot molecule side attached to a quantum wire, in the Kondo regime, is studied. The mean-field finite-U slave-boson formalism is used to obtain the solution of the problem. We found conductance cancelations when the molecular energies of the side attached double quantum-dot cross the Fermi energy. We investigate the many body molecular Kondo states as a function of the parameters of the system.