Chaotic motion and supression of commensurability effects in an Andreev antidot billiard

DOI to cite this document:: 10.5283/epub.1342

Boeck, Jo De ; Eroms, Jonathan ; Tolkiehn, Martin ; Weiss, Dieter ; Rössler, Ulrich ; Borghs, Staf

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Date of publication of this fulltext: 05 Aug 2009 13:27

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Abstract

We investigated antidot lattices with Andreev reflecting boundaries both in experiment and theory. The samples consist of arrays of niobium-filled antidots in an InAs-based heterostructure. The quality of the Nb–InAs contact could be controlled by an in situ Ar+ sputter cleaning step. In samples with a high transparency contact, we find a strong reduction of the resistance around B=0 and a ...