Surface X-Ray Speckles: Coherent Surface Diffraction from Au(001)

M. S. Pierce, K. C. Chang, D. Hennessy, V. Komanicky, M. Sprung, A. Sandy, and H. You

Phys. Rev. Lett. 103, 165501 – Published 15 October 2009

Abstract

We present coherent speckled x-ray diffraction patterns obtained from a monolayer of surface atoms. We measured both the specular anti-Bragg reflection and the off-specular hexagonal reconstruction peak for the Au(001) surface reconstruction. We observed fluctuations of the speckle patterns even when the integrated intensity appears static. By autocorrelating the speckle patterns, we were able to identify two qualitatively different surface dynamic behaviors of the hex reconstruction depending on the sample temperature.

Received 15 June 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.165501

Authors & Affiliations

M. S. Pierce¹, K. C. Chang¹, D. Hennessy¹, V. Komanicky^1,2, M. Sprung^3,4, A. Sandy³, and H. You¹

¹Materials Science Division, Argonne National Laboratory, Argonne Illinois 60439, USA
²Faculty of Sciences, Safarik University, Košice, 04001, Slovakia
³Advanced Photon Source, Argonne National Laboratory, Argonne Illinois 60439, USA
⁴HASYLAB, DESY, Hamburg, Germany

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Vol. 103, Iss. 16 — 16 October 2009

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