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Surface Structure Determination of C(2×2) N2/Ni(100) and Low and Intermediate Coverages of Co/Cu(111) by Angle-Resolved Photoemission Fine Structure (Arpefs) Using Synchrotron Radiation

Published online by Cambridge University Press:  15 February 2011

E. J. Moler ,
W. R. A. Huff ,
S. A. Kellar ,
Z. Hussain ,
Y. F. Chen  and
D. A. Shirley
E. J. Moler
Affiliation:
Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, contact: ejmoler@lbl.gov
W. R. A. Huff
Affiliation:
Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, contact: ejmoler@lbl.gov
S. A. Kellar
Affiliation:
Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, contact: ejmoler@lbl.gov
Z. Hussain
Affiliation:
Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, contact: ejmoler@lbl.gov
Y. F. Chen
Affiliation:
Depts. of Chemistry and Physics, Pennsylvania State University, University Park, PA 16802
D. A. Shirley
Affiliation:
Depts. of Chemistry and Physics, Pennsylvania State University, University Park, PA 16802
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Abstract

We have determined the adsorption site and interlayer spacings of c(2×2) N2/Ni(100),(√3 × √3)R30° and (1.5 × 1.5)R18° CO adsorbed on Cu(111), using ARPEFS and a full Multiple-Scattering, Spherical Wave (MSSW) calculation program. The nitrogen molecule stands upright at an atop site, with a N-Ni bond length of 2.25(1) Å, a N-N bond length of 1.10(7) Å, and a first layer Ni-Ni spacing of 1.76(4) Å. The C-Cu bond length is 1.91 (1) Å in the (√3 × √3)R30° phase and 1.91(2) Å in the (1.5 × 1.5)R18° phase. The first layer Cu-Cu spacing is 2.07(3) Å in the (√3 × √3)R30° phase. The first layer Cu-Cu spacing in the (1.5 × 1.5)R18° phase is 2.01(4) Å, a contraction of 3 % from the clean metal value of 2.07 Å.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 440: Symposia CA – Structure and Evolution of Surfaces , 1996 , 45
Copyright
Copyright © Materials Research Society 1997

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