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TT: Fachverband Tiefe Temperaturen
TT 28: Transport - Poster Session
TT 28.43: Poster
Thursday, March 29, 2007, 14:00–17:45, Poster A
Magnetoconductance of the Oval — Daniel Buchholz1 and •Peter Schmelcher1,2 — 1Theoretische Chemie, Institut für Physikalische Chemie, Universität Heidelberg, INF 229, 69120 Heidelberg — 2Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg
We have calculated the ballistic quantum conductance of an open, two-dimensional, oval-shaped quantum dot with hard-wall boundary conditions using the Landauer-Büttiker formalism. The conductance depends on the deformation parameter of the oval: In the absence of magnetic fields, the temperature-averaged conductance is strongly suppressed inside an energy window covering one fourth of the first channel. A relatively weak perpendicular magnetic field raises the conductance to its maximal value.