Orateur
Régis Melin
(Institut Néel)
Description
The possibility of realizing in the future a source of spin-entangled pairs of
electrons based on three-terminal normal metal-superconductor-normal metal
structures has aroused considerable interest recently, both theoretical and
experimental. The topic of available experiments is to measure either the
current flowing in one of the normal electrodes in response to a voltage on
the other normal electrode, or to evaluate current-current noise
cross-correlations. I will present our theoretical results showing that,
surprisingly, positive current-current cross-correlations can be obtained for
highly transparent contacts [1,2]. These positive cross-correlations at high
transparency have nothing to do with Cooper pair splitting.
[1] R. Melin, C. Benjamin and Th. Martin, Phys. Rev. B 77, 094512 (2008).
[2] A. Freyn, M. Flöser and R. Melin, Phys. Rev. B 82, 014510 (2010).
