Abstract
We have determined the structure of the clean W(110) surface from full solid angle site-resolved photoelectron diffraction. The large data set required was obtained with high brightness third generation synchrotron radiation from the Advanced Light Source. The diffraction pattern from the surface component in W 4f7/2, excited at a low kinetic energy of approximately 40eV, was analyzed through multiple scattering diffraction theory and R-factors, in part as a test case for such high resolution, low energy photoelectron diffraction structure determinations. The angular dependence of the surface/bulk intensity ratio also permitted estimation of the electron inelastic attenuation length at 2–4Å. We conclude that the surface layer has a slight outward relaxation of 0.10Å, or about 4.5% of the first interlayer separation, in general agreement with prior studies. The influence of various non-structural input parameters on the analysis is also discussed.
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