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X-ray Standing Wave and Its Applications to Condensed Matter Physics

Fri., Nov. 8, 2013 3:30 p.m. - Fri., Nov. 8, 2013 4:30 p.m.

Location: CL 305

X-ray stand wave (XSW) is generated by coherent interference between incident and diffracted X-rays. Control of intensity maximum position of the spatially modulating XSW has been a powerful tool to get atomic-scale structure information. X-ray diffractions by single crystal substrate, thin film, multilayer and total external reflection have been used to generate the XSW’s applicable to a wide range of length scale. The XSW analysis applies X-ray scattering and spectroscopy simultaneously and provides element specific, atomic-scale structure information. Combined with the photon-in and photon-out approach, the XSW has an advantage in study of in situ film growth, liquid-solid interface, and mixed-oxide catalysis.
 
The seminar will introduce applications of XSW and recent development of model-independent, Fourier synthesis of atom distribution map from the XSW analysis. Site-specific valence band photoemission and application of the XSW imaging method to supported metal oxide systems will be presented.

Speaker: Dr. Chang-Yong Kim, Canadian Light Source