Phys. Rev. Lett. 103, 165501 (2009) [4 pages]Surface X-Ray Speckles: Coherent Surface Diffraction from Au(001)Received 15 June 2009; published 15 October 2009 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. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.103.165501
DOI:
10.1103/PhysRevLett.103.165501
PACS:
61.05.cm, 68.35.B−, 68.35.Md
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