Title: Energy spectroscopy of Andreev levels between two superconductors
Authors: Morpurgo, AF
van Wees, BJ
Klapwijk, TM
Borghs, Gustaaf #
Issue Date: Jun-1998
Publisher: Elsevier science bv
Series Title: Physica B vol:251 pages:458-461
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 the part of the conductance which is modulated by the macroscopic phase difference. The modulation amplitude oscillates as a function of energy and the phase exhibits an abrupt shift close to pi at the energy for which the amplitude is minimum. We discuss how our findings are related to the properties of bound states formed between the two superconductors. (C) 1998 Elsevier Science B.V. All rights reserved.
ISSN: 0921-4526
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physics and Astronomy - miscellaneous
# (joint) last author

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