Energy spectroscopy of Andreev levels between two superconductors
作者： A.F Morpurgo , B.J van Wees , T.M Klapwijk , G Borghs
DOI: 10.1016/S0921-4526(98)00163-X
关键词: Spectroscopy 、 Condensed matter physics 、 Superconductivity 、 Physics 、 Bound state 、 Conductance 、 Amplitude 、 Andreev reflection 、 Electron spectroscopy 、 Phase (waves)
摘要: 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 part conductance which is modulated macroscopic phase difference. The modulation amplitude oscillates as function and exhibits an abrupt shift close to π for minimum. discuss how our findings are related properties bound states formed between superconductors.
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