Strong Tunneling in Small Quantum Dots: Kondo Effect in Two Model Systems |
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| Authors: | Teemu Pohjola, Daniel Boese, Jü rgen Kö nig, Herbert Schoeller Gerd Schö n |
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| Affiliation: | (1) Materials Physics Laboratory, Helsinki University of Technology, Finland;(2) Institut für Theoretische Festkörperphysik, Universität Karlsruhe, Germany;(3) Department of Physics, Indiana University, Bloomington, Indiana, USA;(4) Institut für Nanotechnologie, Forschungszentrum Karlsruhe, Germany |
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| Abstract: | We study electron transport through single and double quantumdots with large level spacing and charging energy. Motivatedby recent experiments we focus on linear and nonlinearresponse of two model systems: a single dot with two levelsand a capacitively coupled double dot. At low temperature andstrong coupling to the leads, quantum fluctuations and Kondo-like many-body effects become important and show up, e.g., asresonances in the current-voltage characteristics. Inparticular, we propose a way to observe the splitting of theKondo peak as a function of the applied bias voltage. |
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