Surface lattice dynamics of rutileTiO2(110)using helium atom surface scattering
作者： E. A. Akhadov , S. A. Safron , J. G. Skofronick , D. H. Van Winkle , F. A. Flaherty
DOI: 10.1103/PHYSREVB.68.035409
关键词: Surface states 、 Surface force 、 Optics 、 Dispersion (water waves) 、 Surface phonon 、 Materials science 、 Brillouin zone 、 Helium atom 、 Helium atom scattering 、 Scattering 、 Molecular physics 、 Condensed matter physics
摘要: The lattice dynamics of the ruffle TiO 2 (110) surface has been investigated by means high-resolution helium atom scattering (HAS) techniques over temperature range ∼100-1000 K. HAS diffraction in ΓX, ΓS, andΓY Brillouin zone directions indicates that almost entire retains bulk termination (1×1) structure under preparation conditions employed. Surface phonon dispersion curves and rY regions zone, obtained through inelastic measurements single-phonon creation annihilation events, reveal changes forces as varies. Although model calculations for this are not currently available, observed modes interpreted, part, comparison with reported rutile MgF surface.
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