Frequency-Dependent Transport through a Quantum Dot in the Kondo Regime

M. Sindel, W. Hofstetter, J. von Delft, and M. Kindermann
Phys. Rev. Lett. 94, 196602 – Published 19 May 2005

Abstract

We study the ac conductance and equilibrium current fluctuations of a Coulomb-blockaded quantum dot in the Kondo regime. To this end we have developed an extension of the numerical renormalization group suitable for the nonperturbative calculation of finite-frequency transport properties. We demonstrate that ac transport gives access to the many-body resonance in the equilibrium spectral density. It provides a new route for measuring this key signature of Kondo physics, which so far has defied direct experimental observation.

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  • Received 14 June 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.196602

©2005 American Physical Society

Authors & Affiliations

M. Sindel1, W. Hofstetter2, J. von Delft1, and M. Kindermann2

  • 1Physics Department, Arnold Sommerfeld Center for Theoretical Physics, and Center for NanoScience, Ludwig-Maximilians-Universität München, 80333 München, Germany
  • 2Department of Physics, Massachusetts Institute of Technology, Cambridge Massachusetts 02139, USA

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Issue

Vol. 94, Iss. 19 — 20 May 2005

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