STEP STRUCTURE OF VICINAL GE(001) SURFACES

SURFACE SCIENCE

卷:322

Article

关键词: EQUILIBRIUM THERMODYNAMICS AND STATISTICAL MECHANICS;    GERMANIUM;    SCANNING TUNNELING MICROSCOPY;    SURFACE STRUCTURE, MORPHOLOGY, ROUGHNESS, AND TOPOGRAPHY;   

DOI  :  10.1016/0039-6028(95)90011-X

来源: Elsevier

【 摘 要 】

The microscopic details of the step morphology of vicinal Ge(001) surfaces are analyzed on an atomic level using scanning tunnelling microscopy. Despite the strong correspondence to vicinal Si(001) surfaces, the step structure of the vicinal Ge(001) surface exhibits some significant differences. Rebonded, as well as nonbonded SE step edges, are observed and, related to the occurrence of both configurations, kinks with a minimum length of a(o) (approximate to 4 Angstrom) do occur. Kinks in SE rebonded step edges can be regarded as independent excitations whereas for kinks in SE nonbonded step edges this is definitely not the case. Occasionally dimers are found at the SE steps, which are located just in between two dimer rows of the upper terrace. Finally, for the first time a ferromagnetic-like coupling between buckled dimers in the same row is observed close to step edges.

【 授权许可】

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