Title: Commensurability effects in Andreev antidot billiards
Authors: Eroms, J
Tolkiehn, M
Weiss, D
Rossler, U
De Boeck, J
Borghs, Gustaaf #
Issue Date: May-2002
Publisher: E d p sciences
Series Title: Europhysics letters vol:58 issue:4 pages:569-575
Abstract: An Andreev billiard was realised in an array of niobium filled antidots in a high-mobility InAs/AlGaSb heterostructure. Below the critical temperature T-C of the Nb dots we observe a strong reduction of the resistance around B=0 and a suppression of the commensurability peaks which are usually found in antidot lattices. Both effects can be explained in a classical Kubo approach by considering the trajectories of charge carriers in the semiconductor, when Andreev reflection at the semiconductor-superconductor interface is included. For perfect Andreev reflection, we expect a complete suppression of the commensurability features, even though motion at finite B is chaotic.
ISSN: 0295-5075
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physics and Astronomy - miscellaneous
# (joint) last author

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