Angle-resolved photoemission study of the clean and hydrogen-covered Pt(111) surface

Journal Article · Sat Feb 15 04:00:00 EST 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.45.3652· OSTI ID:5005072

Di, W; Smith, K E; Kevan, S D ^[1]

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1. Physics Department, University of Oregon, Eugene, Oregon 97403 (United States)

We report the results of a high-resolution angle-resolved photoemission study of the surface electronic structure of clean and hydrogen-covered Pt(111). Several surface-resonance bands and one surface state are observed on the clean surface. These exhibit qualitative similarities to, as well as some differences from, previous studies and calculations for Pd(111). Unlike the results for Pd(111), essentially all surface bands are quenched upon hydrogen exposure, even at room temperature. There is no clear support in our data for a structural model placing the hydrogen atoms in an underlayer adsorption site, as had been suggested from a previous photoemission study. The significance of our results to a recently proposed correlated-quantum-liquid model is investigated. We also discuss the relevance of our bands near {ital E}{sub {ital F}} to a recent controversy about the possible existence of phonon anomalies on this surface.

• DOE Contract Number: FG06-86ER45275
• OSTI ID: 5005072
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 45:7; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ADSORPTION
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION
ENERGY LEVELS
FERMI LEVEL
HYDROGEN
METALS
NONMETALS
PHOTOEMISSION
PLATINUM
PLATINUM METALS
SECONDARY EMISSION
SORPTION
SURFACES
TRANSITION ELEMENTS