Coherent Surface X-ray Scattering: Observation of Pt (001) Step-Flow Motion

ORAL

Abstract

We recently [1] observed oscillations of speckle intensities from the Pt (001) surface at high temperatures (T $>$ 1620K), persisting for tens of minutes. Using a model of hex-reconstructed terraces we showed that the observed oscillations come from surface dynamics due to sublimation induced step-flow motion. Our results demonstrate the possibility that coherent surface x-ray scattering (CSXS) can be applied to monitor the real-time evolution of surfaces. Hopefully CSXS can be extended further to in-situ ``real-world'' environments. This work and the use of the Advanced Photon Source were supported by the U.S. DOE, Office of Basic Energy Sciences under Contract No. DE-AC02-06CH11357. The work at Safarik University was supported by VEGA 1/0138/10 and VVCE-0058-007.\\[4pt] [1] M.S. Pierce, et al., Appl. Phys. Lett. 99, 121910 (2011).

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Authors

  • Michael Pierce

    Rochester Institute of Technology, Department of Physics, Rochester Institute of Technology

  • Daniel Hennessy

    Materials Science Division, Argonne National Laboratory

  • Kee-Chul Chang

    Materials Science Division, Argonne National Laboratory

  • Vladimir Komanicky

    Safarik University, Faculty of Science, Safarik University

  • Joseph Strzalka

    Argonne National Laboratory, Advanced Photon Source, Argonne National Laboratory

  • Alec Sandy

    Advanced Photon Source, Argonne National Laboratory

  • Andi Barbour

    Materials Science Division, Argonne National Laboratory

  • Hoydoo You

    Materials Science Division, Argonne National Laboratory