Hungary: Week exposes weak links

Magnetically controlled superconducting weak links

We have designed and characterized a magnetic template which can be switched between chains of parallel and antiparallel field distribution by applying an in-plane magnetic field. The parallel field profile creates highly mobile vortex channels in a superconducting film deposited on top, reproducing the behavior of a weak link as evidenced by the presence of Shapiro steps in the current-voltage...

Superfluid 4 He weak links

Superfluid He weak links

Strong links are important, but weak links stabilize them.

Recently, a highly uneven distribution of metabolic network fluxes has been described in Escherichia coli that defines a high-flux backbone containing the most important (and most familiar) metabolic reactions. These findings might lead to a better understanding of the organization of the minimal gene set, and to a novel explanation for the allometric scaling laws. The scalefree distribution of...

Single Wall Carbon Nanotube Weak Links

We have reproducibly contacted gated single wall carbon nanotubes (SWCNT) to su-perconducting leads based on niobium. The devices are identified to belong to two transparency regimes: The Coulomb blockade and the Kondo regime. Clear signature of the superconducting leads is observed in both regimes and in the Kondo regime a narrow zero bias peak interpreted as a proximity induced supercurrent p...

Securing Electronic Commerce: Exposing the Weak Links