Observation of double- to single-domain transition on the Eu/Si(1 0 0) surface by LEED and STM |
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Authors: | M Kuzmin P Laukkanen RE Perälä R-L Vaara IJ Väyrynen |
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Institution: | Department of Physics, University of Turku, FIN-20014 Turku, Finland |
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Abstract: | The orientational phase diagram and morphology of the Eu-adsorbed Si(1 0 0) surface miscut by 0.4° have been studied by low-energy electron diffraction and scanning tunneling microscopy. We demonstrate that the original double-domain configuration with single-layer steps on the Si(1 0 0) substrate can be drastically broken at 0.4 monolayer (ML) of Eu. At this coverage, the ordered domain pattern formed by topographically non-equivalent terraces with Eu-induced 2 × 3 and “2 × 1” (so-called “wavy” structure) reconstructions is found, while no orthogonal 3 × 2 and “1 × 2” domains are observed. A model of the single-domain surface is proposed. The origin of the double- to single-domain transition found for the Eu/Si(1 0 0) system is discussed. |
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Keywords: | Silicon Lanthanides Surface structure morphology roughness and topography Low-energy electron diffraction (LEED) Scanning tunneling microscopy (STM) |
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