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|Author(s):||Travis M. Eiles; Michel H. Devoret; John M. Martinis;|
|Title:||Coulomb Blockade of Andreev Reflection in the NSN Single Electron Transistor|
|Published:||February 01, 1994|
|Abstract:||We have measured at low temperatures the current through a submicrometer superconducting island connected to nornal metal leads by ultrasmall tunnel junctions. At low bias voltages, the current changes from being e-periodic in the applied gate change to 2e-periodic. We interpret this 2e-periodic current as a manifestation of a sequence of Andreev reflection events which transports two electrons at a time across the island. This behavior is clear evidence that there is a difference in total energy between ground states of differing electron number parity.|
|Citation:||Physica B-Condensed Matter|
|Pages:||pp. 1111 - 1112|
|Keywords:||Andreev reflection,Coulomb blockade,general superconductivity,ultra-small tunnel junctions|
|Research Areas:||Nanoelectronics and Nanoscale Electronics|