Tunable Kondo-Luttinger systems far from equilibrium

C.-H. Chung, K. V. P. Latha, K. Le Hur, M. Vojta, and P. Wölfle
Phys. Rev. B 82, 115325 – Published 27 September 2010

Abstract

We theoretically investigate the nonequilibrium current through a quantum dot coupled to one-dimensional electron leads, utilizing a controlled frequency-dependent renormalization group approach. We compute the nonequilibrium conductance for large bias voltages and address the interplay between decoherence, Kondo entanglement, and Luttinger physics. The combined effect of large bias voltage and strong interactions in the leads, known to stabilize two-channel Kondo physics, results in nontrivial modifications in the conductance. Interestingly, these unusual changes in the conductance persist in the presence of a finite channel asymmetry.

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  • Received 2 September 2010

DOI:https://doi.org/10.1103/PhysRevB.82.115325

©2010 American Physical Society

Authors & Affiliations

C.-H. Chung1,2, K. V. P. Latha2, K. Le Hur1, M. Vojta3, and P. Wölfle4

  • 1Department of Physics and Applied Physics, Yale University, New Haven, Connecticut 06520, USA
  • 2Electrophysics Department, National Chiao-Tung University, HsinChu, Taiwan, Republic of China
  • 3Institut für Theoretische Physik, Universität zu Köln, 50937 Köln, Germany
  • 4Institut für Theorie der Kondensierten Materie, Karlsruher Institut für Technologie, 76128 Karlsruhe, Germany

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Vol. 82, Iss. 11 — 15 September 2010

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