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Surface acoustic wave resonance spectroscopy (SAWRS) as a novel technique to study surface phenomena
Author(s) -
Boronin A. I.,
Kvon R. I.,
Prosvirin I. P.,
Brezhnev V. N.,
Ostanin V. P.,
Seriklaev I. E.,
Tupikov V. S.,
Belyaev A. N.
Publication year - 1994
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.7402201124
Subject(s) - resonance (particle physics) , excitation , surface phonon , spectroscopy , range (aeronautics) , surface (topology) , phonon , resolution (logic) , vibration , acoustic resonance , surface acoustic wave , spectral line , materials science , molecular physics , acoustic wave , atomic physics , chemistry , optics , condensed matter physics , acoustics , physics , geometry , mathematics , quantum mechanics , astronomy , artificial intelligence , computer science , composite material
A new method is proposed for investigating surface phenomena based on the observation of the acoustic vibration modes of surface structures at high resolution. Experimental SAWR spectra can be obtained under a narrow frequency band excitation (Δω/ω ∼ 10 −5 ) in a wide range (100 kHz–10 MHz). Application of this method to Ag(111) and Pt(100) single crystals reveals the existence of very narrow resonant acoustic vibration modes with Δω/ω ∼ 10 −3 –10 −4 demonstrating strong anomalies in the phonon energy distribution function of solids. The behaviour of these anomalous peaks is very sensitive to surface structure and to the presence of adsorbates.