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Photoelectron-Diffraction Studies of Nb(001)

Author

Listed:
  • W.-S. Lo

    (Research Division, Synchrotron Radiation Research Center, Hsin-Chu, Taiwan 300, ROC)

  • T.-S. Chien

    (Research Division, Synchrotron Radiation Research Center, Hsin-Chu, Taiwan 300, ROC)

  • B.-S. Fang

    (Research Division, Synchrotron Radiation Research Center, Hsin-Chu, Taiwan 300, ROC;
    Department of Physics, National Tsing Hua University, Hsin-Chu, Taiwan 300, ROC)

  • C. M. Wei

    (Institute of Physics, Academia Sinica, Nankang, Taiwan 11529, ROC)

  • W. N. Mei

    (Department of Physics, University of Nebraska at Omaha, Nebraska 68182, USA)

Abstract

Photoelectron-diffration studies of Nb(001) have been performed to determine the first-interlayer contraction using Mg Kα radiation (hν=1253.6eV) as an excitation source. Photoemission intensities of the3d5/2core level were measured as a function of the polar angle along several azimuths on the single-crystal surface. The 202.3-eV (205.O-eV) binding energy for the3d5/2(3d3/2)core level was well resolved in the photoemission spectra, where the peak intensity could be easily evaluated by curve-fitting processes. Large oscillations of the3d5/2intensity as a function of the polar angle due to forward-focusing were observed. Based on multiple-scattering calculations for several first-interlayer spacings ranging from the bulk value to 16% contraction, the best agreement with experiment was obtained for a(13±5)%contraction of the first-interlayer spacing.

Suggested Citation

  • W.-S. Lo & T.-S. Chien & B.-S. Fang & C. M. Wei & W. N. Mei, 1998. "Photoelectron-Diffraction Studies of Nb(001)," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 5(05), pages 1035-1041.
    • Handle: RePEc:wsi:srlxxx:v:05:y:1998:i:05:n:s0218625x98001407
    DOI: 10.1142/S0218625X98001407
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