X-ray photoelectron spectroscopy of bulk glassy Se under Ar ion bombardment |
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Authors: | B.R. Orton J.C. Rivière |
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Affiliation: | Physics Department, Brunel University, Uxbridge, UK;AERE, Harwell, UK |
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Abstract: | It has been found that Ar ion bombardment produces reversible changes in the XPS structure of the valence band of glassy Se. The result of ion bombardment is that the 4 p bonding and non-bonding peaks merge to give a single broad peak at a binding energy similar to that of the non-bonding peak. This merger of the bonding and non-bonding peaks occurs in density of state calculations when the dihedral angle between adjacent bonds is allowe to take any angle. It is concluded, therefore, that ion bombardment introduces a random dihedral angle into the glassy structure, which subsequently relaxes to give the fixed dihedral angle, but with a random direction which density of states calculations and diffraction work indicate as the structure of the glass. |
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