Title: Energy spectroscopy of Andreev levels between two superconductors
Authors: Morpurgo, AF
vanWees, BJ
Klapwijk, TM
Borghs, Gustaaf #
Issue Date: Nov-1997
Publisher: American physical soc
Series Title: Physical Review Letters vol:79 issue:20 pages:4010-4013
Abstract: We perform energy spectroscopy of Andreev reflection processes occurring at two superconducting electrodes connected in series via a ballistic two dimensional channel, by measuring the voltage dependence of that part of the conductance modulated by the macroscopic phase difference. The amplitude of the modulation oscillates as a function of energy and the phase exhibits an abrupt shift close to rr at the energy for which the amplitude is minimum. A microscopic theoretical description ascribes the phenomenon to the precursor of a bound state formed between the two superconductors.
ISSN: 0031-9007
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physics and Astronomy - miscellaneous
# (joint) last author

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