Spin- and angle-resolved photoemission study of chemisorbed p (1 times 1) O on epitaxial ultrathin Fe/W(001) films
- Department of Physics, University of Texas at Austin, Austin, Texas 78712 (United States)
- Department of Physics and the Rice Quantum Institute, Rice University, Houston, Texas 77251 (United States)
Chemisorbed {ital p}(1{times}1) oxygen on ultrathin epitaxial Fe films grown on W(001) are studied using spin- and angle-resolved photoemission. In agreement with theoretical predictions, single-monolayer (ML) Fe films on W(001) are found to be nonmagnetic; 2-ML-thick Fe films are magnetic, and chemisorbed {ital p}(1{times}1) oxygen does not destroy the magnetism. Even- and odd-symmetry oxygen 2{ital p}-derived bands are measured along the {bar {Gamma}}-{ital {bar X}} and {bar {Gamma}}-{ital {bar M}} directions of the two-dimensional Brillouin zone. Oxygen-derived features in the photoemission spectra exhibit magnetic exchange splitting as well as spin-dependent intrinsic linewidths that are governed by lifetime effects and initial-state mixing with Fe bands. Oxygen 2{ital p}-band narrowing resulting from the expanded Fe thin-film lattice constant is observed. The results are compared with relevant calculations and corresponding experimental studies of {ital p}(1{times}1) oxygen on bulk Fe(001) surfaces.
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 7238295
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 45:17; ISSN PRBMD; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102* -- Metals & Alloys-- Structure & Phase Studies
CHARGE EXCHANGE
CHEMICAL REACTIONS
CHEMISORPTION
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION
FILMS
IRON
MAGNETIC PROPERTIES
METALS
NONMETALS
OXYGEN
PHOTOEMISSION
PHYSICAL PROPERTIES
SECONDARY EMISSION
SEPARATION PROCESSES
SORPTION
THIN FILMS
TRANSITION ELEMENTS