Regensburg 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 46: Quantum Dots and Wires: Transport
HL 46.1: Vortrag
Mittwoch, 24. März 2010, 14:00–14:15, H17
Study of two-Kondo impurities coupled via an open conducting reservoir — •Daniel Tutuc1, Werner Wegscheider2, and Rolf J. Haug1 — 1Institut für Feskörperphysik, Leibniz Universität Hannover, D-30167 Hannover — 2Angewandte und Experimentelle Physik, Universität Regensburg, D-93040 Regensburg
We present measurements on a structure consisting of two quantum dots connected via an open conducting region, in Kondo regime. The sample is created by Local Anodic Oxidation with an AFM on a GaAs/AlGaAs heterostructure with a 2DEG 37nm beneath the surface. The measurements have been performed with the standard lock-in technique, in a dilution refrigerator, at about 200 mK electron temperature. At finite magnetic fields both dots exibit the so-called Kondo chessboard pattern and we investigate the effective interaction between the dots as a function of edge states direction and tunnel coupling to the central region.
[1] N. J. Craig et al., Science 304, 565 (2004)
[2] P. Simon, et al., Phys. Rev. Lett. 94, 086602 (2005)
[3] M. G. Vavilov and L. I. Glazman, Phys. Rev. Lett. 94, 086805 (2005)