LEED investigations on Co(0001): The (sqrt3 x sqrt3)R30 degrees-CO overlayer

Journal Article · Sat Sep 11 04:00:00 EDT 1999 · Surface Science

OSTI ID:793783

Lahtinen, J ^[1]; Vaari, J; Kauraala, K; Soares, E A; Van Hove, M A

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1. LBNL Library

The local adsorption structure of CO on Co(0001) was determined at 160 K using dynamical low-energy electron diffraction (LEED). The CO molecules in the (root3xroot3) R30 degrees-CO overlayer adopt the on-top site with the CO axis perpendicular to the surface and induce buckling in the top Co layer pulling the Co atom beneath the CO by 0.04 plus or minus 0.04 Angstrom outwards. The optimum length for the CO bond is 1.17 plus or minus 0.06 Angstrom and that for the C-Co distance 1.78 plus or minus 0.06 Angstrom. The first layer Co-Co distance is 2.04 Angstrom and thus only slightly expanded from the bulk value. The obtained structure is compared to other known CO structures on transition metals.

• Research Organization: Ernest Orlando Lawrence Berkeley National Lab., CA (US)
• Sponsoring Organization: USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 793783
• Report Number(s): LBNL--49721
• Journal Information: Surface Science, Journal Name: Surface Science Journal Issue: 2-3 Vol. 448; ISSN SUSCAS; ISSN 0039-6028
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADSORPTION
CARBON MONOXIDE
COBALT
COBALT CARBON MONOXIDE LEED SURFACE STRUCTURE
ELECTRON DIFFRACTION
SORPTIVE PROPERTIES