Eroms, Jonathan and Tolkiehn, Martin and Weiss, Dieter and Rössler, Ulrich and Boeck, J. De and Borghs, G. (2002) Commensurability effects in Andreev antidot billiards. Europhysics Letters 58 (4), pp. 569-575.
Download (177kB) - Repository staff only
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.
|Institutions:||Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss|
Physics > Institute of Theroretical Physics > Retired Professors > Group Ulrich Rössler
|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:||13 Mar 2014 09:52|