Boeck, Jo De and Eroms, Jonathan and Tolkiehn, Martin and Weiss, Dieter and Rössler, Ulrich and Borghs, Staf (2002) Chaotic motion and supression of commensurability effects in an Andreev antidot billiard. Physica E 12 (1-4), pp. 918-921.
Download (187kB) - Repository staff only
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 suppression of the commensurability peaks. These observations can be explained in a classical Kubo approach by including Andreev reflection and assuming a magnetic-field-dependent Andreev reflection probability.
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss|
Physics > Institute of Theroretical Physics > Retired Professors > Group Ulrich Rössler
|Projects:||Forschergruppe Ferromagnet-Halbleiter Nanostrukturen|
|Keywords:||Magnetotransport; Antidot lattice; Nb dot array; InAs; Chaos|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||20 Jul 2011 20:55|