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Publication Citation: Coulomb Blockade of Andreev Reflection in the NSN Single Electron Transistor

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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
Volume: 194
Issue: Part 1
Pages: pp. 1111 - 1112
Keywords: Andreev reflection;Coulomb blockade;general superconductivity;ultra-small tunnel junctions;
Research Areas: Nanoelectronics and Nanoscale Electronics