Commensurability effects in Andreev antidot billiards

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An Andreev billiard was realized 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.
4 pages, 4 figures

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Mesoscale and Nanoscale Physics, Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/17994

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0107165
 http://arxiv.org/abs/cond-mat/0107165
 Europhys. Letters 58, 569 (2002)
 doi:10.1209/epl/i2002-00433-3

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arXiv