Observation of surface rippling on Cu3u(100) with ToF-ISS

L. Houssiau, Patrick Bertrand

Research output: Contribution to journalArticlepeer-review

Abstract

We have investigated a Cu3Au(100) surface with ToF-ISS. The crystal was accurately oriented by use of azimuthal scans taken at grazing incidence. The polar scans measured with 2 keV Ne ions prove that the surface is unambiguously terminated by a mixed and ordered CuAu layer at room temperature. Along the 〈 100〉 azimuth, the ion beam analyses only the rows of the first monolayer, which are either pure Cu rows or pure Au rows. Along the 〈110〉 azimuth, the beam analyses rows of the first plane, which are alternated Cu-Au chains, but also the pure Cu rows in the second plane. This implies that the Cu signal is more intense in this direction than in others. The most striking result along the 〈110〉 rows is the direct measurement of rippling on the first atomic layer. We show that Au atoms lie 0.12 Å above the Cu atoms, which is in pretty good agreement with theoretical predictions.

Original languageEnglish
Pages (from-to)161-164
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume115
Issue number1-4
Publication statusPublished - 1 Jul 1996

Fingerprint

Dive into the research topics of 'Observation of surface rippling on Cu<sub>3</sub>u(100) with ToF-ISS'. Together they form a unique fingerprint.

Cite this