Photoelectron-Diffraction Studies of Nb(001)-Reference-Cited by-同舟云学术

Photoelectron-Diffraction Studies of Nb(001)

Published:1998-10 Issue:05 Volume:05 Page:1035-1041
ISSN:0218-625X
Container-title:Surface Review and Letters
language:en
Short-container-title:Surf. Rev. Lett.

Author:

Lo W.-S.¹,Chien T.-S.¹,Fang B.-S.¹²,Wei C. M.³,Mei W. N.⁴

Affiliation:

1. Research Division, Synchrotron Radiation Research Center, Hsin-Chu, Taiwan 300, ROC

2. Department of Physics, National Tsing Hua University, Hsin-Chu, Taiwan 300, ROC

3. Institute of Physics, Academia Sinica, Nankang, Taiwan 11529, ROC

4. 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=1253.6 eV) as an excitation source. Photoemission intensities of the 3d 5/2 core 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 the 3d 5/2( 3d 3/2) core level was well resolved in the photoemission spectra, where the peak intensity could be easily evaluated by curve-fitting processes. Large oscillations of the 3d 5/2 intensity 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.

Publisher

World Scientific Pub Co Pte Lt

Subject

Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces,Condensed Matter Physics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0218625X98001407

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