Abstract
Rutherford backscattering measurements (RBS) of Pt(110) and Au(l10) surfaces, both of which exhibit a (1×2) reconstruction, have been made over the temperature range 160–600 K (Pt) and 150–1000 K (Au). Angular scans about the [110] and [100] directions have been measured for the (1×2) phase on both materials. Detailed Monte Carlo simulation studies, including the effects of equal-time displacement correlations, have been used to interpret the vibrational properties of this surface phase. The Pt [110] surface peak data provide clear evidence that correlations of the atom vibrations exist and are consistent with those expected from bulk inelastic neutron scattering measurements. This was not the case for the Au [110] surface peak which exhibited higher yields than predicted.
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