Journal article
H on tungsten(110): Studied by angle resolved photoemission and inelastic electron scattering
Surface science, v 118(3), pp 496-512
01 Jun 1982
Abstract
We have investigated the system H adsorbed on W(110) using angle resolved photoemission (with synchrotron radiation) and high resolution inelastic electron scattering. The photoemission results show that most of the structure in the spectra (or difference curves) induced by the H adsorption is due to enhancement or diminution of clean surface electronic states. The most striking feature of the normal emission data is the reduction in the symmetry of the surface for a hydrogen coverage greater than
1
2
of a monolayer. The C
2v symmetry of the surface is broken for these higher coverages indicating a change in the H bonding between low and high coverage. In contrast, the electron scattering data show a set of vibrational modes independent of coverage indicating a single site. A symmetry analysis of the mode intensities versus the azimuthal angle of the scattering plane allows us to determine the displacement direction of the mode parallel to the surface. We propose a model consistent with these data, where the H is bound in a bridge type site independent of coverage, but the layer undergoes an order-disorder conversion near
1
2
a monolayer.
Metrics
Details
- Title
- H on tungsten(110): Studied by angle resolved photoemission and inelastic electron scattering
- Creators
- Garciela B. Blanchet - University of PennsylvaniaN.J. Dinardo - University of PennsylvaniaE.W. Plummer - University of Pennsylvania
- Publication Details
- Surface science, v 118(3), pp 496-512
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:A1982NY43000009
- Scopus ID
- 2-s2.0-0040165555
- Other Identifier
- 991021862249704721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical
- Physics, Condensed Matter