Diffuse scattering from Ge(111) surface at high temperature |
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Authors: | T Ichikawa S Ino |
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Institution: | The Research Institute for Iron, Steel and Other Metals, Tohoku University, Sendai, Japan |
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Abstract: | On heating a clean Ge(111) surface above 240°C, Ge(111) 2 × 8 surface structure changes to 1 × 1 one. We have first observed twofold splitting diffuse scattering in RHEED patterns from the Ge(111) 1 × 1 surface at high temperatures. A modulated 2 × 2 structure is proposed as a structural model for the diffuse scattering. The Fermi-surface instability of dangling-bond electrons at the surface is studied as an origin of the formation of the modulated structure. |
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