Hydrogen phonon spectra on transition metal surfaces; Infrared reflection-absorption investigation of Mo(100), W(100), and Pt(111).
01 January 1987
Hydrogen phonon spectra at saturation coverage are reported for Mo(100), W(100), and Pt(111). Surface infrared reflection absorption spectroscopy enabled the evaluation of the dipole contribution to each hydrogen phonon over the 800-4000 cm sup (-1) region. A phenomenological line shape analysis, including the effects of broadband absorption by the substrate due to free carrier excitation and surface state absorption, permitted a quantitative comparison of the three surfaces' absorption and an investigation of the role of electron- phonon interaction.