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TT: Tiefe Temperaturen

TT 16: Postersitzung II: Amorphe und Tunnelsysteme, Mesoskopische Systeme, Schwere Fermionen, Kernmagnetismus

TT 16.24: Poster

Dienstag, 27. März 2001, 14:30–17:00, Rang S\ 3

Kondo effect in a Quantum Dot at finite bias voltage — •Thomas Korb¹, Markus Keil², Jürgen König³, and Herbert Schoeller¹ — ¹Forschungszentrum Karlsruhe, Institut für Nanotechnologie — ²Institut für Theoretische Physik, Universität Göttingen — ³Department of Physics, The University of Texas at Austin

Quantum dot systems represent a fascinating model system for many physical phenomena. The advantage of these systems is the possibility to tune the parameters within a wide range. Recent experiments show that quantum dots can even serve as a model system for experimental studies of the Kondo effect [1]. These experiments stimulated theoretical interests on non-equilibrium effects e.g. the interplay of the two energy scales given by the Kondo temperature and bias voltage. We apply the real time renormalization group method [2] to this problem to find predictions in a systematic way.

[1]	D. Goldhaber-Gordon et al., Nature 391, 156 (1998);
	S.M. Cronenwett et al., Science 281, 540 (1998);
	F. Simmel et al., Phys. Rev. Lett. 83, 804 (1999);
	J. Schmid et al., Phys. Rev. Lett. 84, 5824 (2000).
[2]	An introduction to real-time renormalization group.
	H. Schoeller, in ’Low-Dimensional Systems’ , ed. T. Brandes
	(Springer, 1999), p.137-167.