Phys. Rev. Lett. 70, 2455–2458 (1993)Microscopic observation of atomic disorder near the roughening transition at vicinal copper surfacesReceived 30 November 1992; published in the issue dated 19 April 1993 The appearance of a reversible order-disorder transition at Cu(115) and Cu(117) surfaces has been investigated using perturbed angular correlation spectroscopy. The local atomic arrangement at 111In probes is detected via nuclear quadrupole hyperfine interaction. A broadening of the electric field gradient distribution is measured for elevated temperatures due to structural changes around the probes. The onset of disorder on the atomic scale is found to be well above the roughening transition temperatures measured by various scattering techniques. © 1993 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.70.2455
DOI:
10.1103/PhysRevLett.70.2455
PACS:
68.35.Rh, 76.80.+y
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