Fermi contours and adsorbate periodicities: O/Mo(011) and O/W(011)

Journal Article · Mon Sep 05 04:00:00 EDT 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.73.1448· OSTI ID:7052410

Dhar, S; Smith, K E; Kevan, S D ^[1]

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

We present experimental Fermi contours for surface-localized states on O/Mo(011) and O/W(011). The contours are consistent with the fact that a (2[times]2) superstructure is observed on Mo(011) but not on W(011) through a global Fermi contour instability in which entire orbits are closely coupled by the wave vector of the superlattice. Our results are also consistent with a recently observed sevenfold reconstruction of the (2[times]2) oxygen structure on Mo(011) through a simple Peierls mechanism. We discuss the generality of such behavior in adsorption systems.

• DOE Contract Number: FG06-86ER45275
• OSTI ID: 7052410
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 73:10; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ADSORPTION
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION
ENERGY LEVELS
FERMI LEVEL
METALS
MOLYBDENUM
NONMETALS
OXYGEN
PHOTOEMISSION
SECONDARY EMISSION
SORPTION
SUPERLATTICES
SURFACE PROPERTIES
TRANSITION ELEMENTS
TUNGSTEN