Berlin 2005 – scientific programme

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TT: Tiefe Temperaturen

TT 26: Superconductivity - Heterostructures, Andreev Scattering, Proximity Effect, Coexistence

TT 26.6: Talk

Tuesday, March 8, 2005, 11:30–11:45, TU H3027

Charge Transport in Andreev Billiards with a Superconducting Antidot — •A. Lassl¹, K. Richter¹, P. Schmelcher², F. Diakonos³, M. Scheid¹, and N. Fitas³ — ¹University of Regensburg — ²University of Heidelberg — ³University of Athens

We study the transport properties of a normal conducting electron billiard in contact with a superconductor. In particular we are interested in the magnetic field dependence of the particle and hole transmission and reflection coefficients. For our numerical simulations we chose a Sinai billiard with a superconducting antidot in the center of the quadratic scattering region. The presence of the superconductor changes the dynamics of the system due to Andreevreflection. The results of a purely classical and a quantum mechanical approach are presented and they show to be in very good agreement.