Surface defects and reconstruction instabilities in Au(001)
نویسندگان
چکیده
Surface defects of a new type have been found on reconstructed Au(001) surfaces following 600-eV Ar+ ion bombardment. They appear as shallow areas 0.6 Å deep, one short period of the reconstruction (14.4 Å) wide. It is proposed that these defects are dislocation dipoles in the hexagonal reconstructed layer, originated by the collapse of surface vacancies. After higher ion doses, large patches of unreconstructed areas surrounded by perpendicular reconstruction domains, also caused by surface-vacancies-induced modifications of the reconstructed layer, are present. © 1999 Elsevier Science B.V. All rights reserved.
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