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

Abstract

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.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley National Lab., CA (US)
Sponsoring Org.:
USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (US)
OSTI Identifier:
793783
Report Number(s):
LBNL-49721
Journal ID: ISSN 0039-6028; SUSCAS; R&D Project: 505501; TRN: US200208%%67
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Journal Article
Journal Name:
Surface Science
Additional Journal Information:
Journal Volume: 448; Journal Issue: 2-3; Other Information: Journal Publication Date: 2000 Mar. 10; PBD: 11 Sep 1999; Journal ID: ISSN 0039-6028
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COBALT; CARBON MONOXIDE; ADSORPTION; ELECTRON DIFFRACTION; SORPTIVE PROPERTIES; COBALT CARBON MONOXIDE LEED SURFACE STRUCTURE

Citation Formats

Lahtinen, J., Vaari, J., Kauraala, K., Soares, E.A., and Van Hove, M.A. LEED investigations on Co(0001): The (sqrt3 x sqrt3)R30 degrees-CO overlayer. United States: N. p., 1999. Web.
Lahtinen, J., Vaari, J., Kauraala, K., Soares, E.A., & Van Hove, M.A. LEED investigations on Co(0001): The (sqrt3 x sqrt3)R30 degrees-CO overlayer. United States.
Lahtinen, J., Vaari, J., Kauraala, K., Soares, E.A., and Van Hove, M.A. Sat . "LEED investigations on Co(0001): The (sqrt3 x sqrt3)R30 degrees-CO overlayer". United States.
@article{osti_793783,
title = {LEED investigations on Co(0001): The (sqrt3 x sqrt3)R30 degrees-CO overlayer},
author = {Lahtinen, J. and Vaari, J. and Kauraala, K. and Soares, E.A. and Van Hove, M.A.},
abstractNote = {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.},
doi = {},
journal = {Surface Science},
issn = {0039-6028},
number = 2-3,
volume = 448,
place = {United States},
year = {1999},
month = {9}
}