Altering the Gd(0001) surface electronic structure with hydrogen adsorption
- Department of Physics, Syracuse University, Syracuse, New York 13244-1130 (United States)
- Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
Hydrogen adsorption on Gd(0001) has been studied with angle-resolved photoemission. Hydrogen adsorption attenuates the surface state near [ital E][sub [ital F]] on the clean Gd(0001) surfaces and induces two two-dimensional bands which are at 3.8 eV and about 6 eV near [bar [Gamma]]. The state with the smaller binding energy has [ital d][sub [ital z]][sup 2] character at [bar [Gamma]] and disperses away from [ital E][sub [ital F]] about 1 eV. The state at the greater binding energy disperses toward [ital E][sub [ital F]] about 0.5--1 eV. At low substrate temperatures (120--130 K), the hydrogen chemisorption on the Gd(0001) surface results in a work-function decrease of 0.2 eV. The correlation between the changes of the surface electronic structure and the corresponding change in the surface magnetic ordering is discussed.
- DOE Contract Number:
- FG02-87ER45319
- OSTI ID:
- 6239677
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:8; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
ADSORPTION
CRYSTALS
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION
FUNCTIONS
GADOLINIUM
HYDROGEN
MAGNETIC PROPERTIES
METALS
MONOCRYSTALS
NONMETALS
PHOTOEMISSION
PHYSICAL PROPERTIES
RARE EARTHS
SECONDARY EMISSION
SORPTION
WORK FUNCTIONS