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Correlated Electron Tunneling through Two Separate Quantum Dot Systems with Strong Capacitive Interdot Coupling

A. Hübel, K. Held, J. Weis, and K. v. Klitzing
Phys. Rev. Lett. 101, 186804 – Published 30 October 2008
Physics logo See Synopsis: Interdot Kondo effect

Abstract

A system consisting of two independently contacted quantum dots with a strong electrostatic interaction shows an interdot Coulomb blockade when the dots are weakly tunnel coupled to their leads. How the blockade can be overcome by correlated tunneling when tunnel coupling to the leads increases is studied experimentally. The experimental results are compared with numerical renormalization group calculations using predefined (measured) parameters. Combining our experimental and theoretical results we identify transport through Kondo correlations due to the electrostatic interaction between the two dots.

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  • Received 29 July 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.186804

©2008 American Physical Society

Synopsis

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Interdot Kondo effect

Published 17 November 2008

Researchers report the observation of a Kondo effect when charge and spin on a double quantum dot system are entangled.

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Authors & Affiliations

A. Hübel1, K. Held1,2, J. Weis1, and K. v. Klitzing1

  • 1Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
  • 2Institute for Solid State Physics, Vienna University of Technology, 1040 Vienna, Austria

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Issue

Vol. 101, Iss. 18 — 31 October 2008

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