We observed well-defined oscillations of speckle intensities from Pt (001) surfaces at high temperatures, persisting for tens of minutes. We used a model of hex-reconstructed terraces to show that the coherent x-rays reflected from the terraces retain their phases relative to the illumination boundary and the observed oscillations come from surface dynamics due to “step-flow” motion. Our results demonstrate a possibility that x-ray speckles can be applied to monitor the real-time evolution of surfaces.
Department, Program, or Center
Center for Materials Science and Engineering
Pierce, Michael; Hennessy, D.; and Chang, K., "Persistent oscillations of X-ray speckles: Pt (001) step flow" (2011). American Institute of Physics,Accessed from
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