Anomalous proximity effect in mesoscopic conductors
Petrashov V. T. , Antonov V. N. , Maksimov S. V., Shaikhaidarov R. Sh.
It has been observed experimentally that a normal mesoscopic conductor coupled by a normal bridge to a superconductor with small dimensions can undergo a transition to states with either elevated or depressed conductivity if the bridge is considerably longer than the coherence length of the normal metal. The changes in the conductance are AG = ±2χ 103 (e2/h).