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A simple digital inelastic electron tunnelling spectrometer
Author(s) -
Reynolds S.,
Gregson L. D.,
Horley C. C.,
Oxley D. P.,
Pritchard R. G.
Publication year - 1980
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.740020606
Subject(s) - spectrometer , quantum tunnelling , derivative (finance) , electron , electron spectrometer , simple (philosophy) , benzoic acid , chemistry , flexibility (engineering) , physics , computational physics , optics , analytical chemistry (journal) , materials science , optoelectronics , quantum mechanics , cathode ray , mathematics , organic chemistry , philosophy , epistemology , financial economics , economics , statistics
A modified inelastic electron tunnelling spectrometer is described which enables data to be stored in digital form in a microcomputer. Subsequent numerical analysis may then be carried out with considerable flexibility and convenience. Presentation of data is possible, not only in second derivative form as in a conventional spectrometer, but also as a third derivative by a simple numerical technique. Examples of data presented in both forms are given for a tunnel junction consisting of Al/AlO x /benzoic acid/Pb. In addition, the third derivative technique is used to subtract a rising background from the second derivative spectrum of an Al/AIO x /benzoic acid/Au tunnel junction.