Rayleigh phonon

We substitute relation (A2.15) or (A2.16) respectively for bulk or Rayleigh phonons into Eq. (A2.23) to obtain the same result 164... 

Kinematics of surface phonon He spectroscopy. The thick lines correspond to scan curves of a 18 meV He beam. The thin lines display the Rayleigh phonon dispersion curve of Pt(lll) along the f M azimuth. 

Fig. 10. (a) He time-of-flight spectrum taken from a LiF(001) surface along the < 100) azimuth at an incident angle Si = 64.2°. The primary beam energy was 19.2 meV. (After Ref 25.). (b) Measured Rayleigh phonon dispersion curve of LiFfOOl) < 100), including a scan curve (dashed) for the kinematical conditions in (a). (After Ref. 25.)... 

Fig, 26. Experimental dispersion curve of the Kr monolayer and measured line width broadening As of the Kr creation phonon peaks. The solid line in the dispersion plot is the clean Pt(lll) Rayleigh phonon dispersion curve and the dashed line the longitudinal phonon bulk band edge of the Pt(l 11) substrate, both in the r Mn azimuth which is coincident with the r Kk, azimuth. 

Fig. 42. Comparison of experimental and theoretical (solid lines) surface phonon dispersion data (frequency vs. parallel component of wave vector) for an ordered c(2x2)-0 Ni(lOO) surface. The calculations are based on the position of 0-atoms at 0.9 A above the surface and the inclusion of lateral dipole-dipole interactions. For comparison, the experimental data for the clean surface Rayleigh phonon (solid points) are also included [83Leh, 84Rah],...

J. Horne and D. Miller, Single-Rayleigh-phonon interaction in the scattering of He from LiF (001), Phys. Rev. Lett. 41 511 (1978). 

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