Abstract
Surface phonon dispersion curves for clean and hydrogen covered W(110) and Mo(110) surfaces have been measured with inelastic helium atom scattering. Whilst the clean surfaces exhibit regular behavior, a sharp dip in the transverse surface phonon branch along the [001] direction at a critical wavevector Q c is evident after hydrogen saturation. In addition, in the case of H/W(110) weak and broad elastic intensity is found in the He diffraction pattern at Q c, indicative of critical scattering, which appears to be independent of the surface temperature in the range between 75 and 300 K. The origin of the phonon anomaly and its connection, if any, to an earlier reported “top layer shift” reconstruction observed with LEED has not yet been established.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
