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Surface Phonons in Spectral Oscillations in the Photoconductivity on Silicon (111) Surfaces
Author(s) -
Ibach H.,
Mönch W.
Publication year - 1973
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220550124
Subject(s) - photoconductivity , surface phonon , phonon , silicon , excitation , materials science , surface (topology) , conductance , condensed matter physics , spectroscopy , atomic physics , molecular physics , optoelectronics , chemistry , physics , quantum mechanics , geometry , mathematics
At clean cleaved silicon (111) surfaces an “oscillatory” photo conductance with excitation of holes out of surface states has been reported [1]. The period of the oscillations is (58 ± 3) meV. A surface phonon (hω s = (56 ± 1) meV) has been found on the same type of surfaces in low energy electron spectroscopy [7]. It is shown that the oscillations in the photoconductivity are caused by the interaction of photoexcited hot holes with the surface phonon.