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We have examined strain–relaxation of Co-2×2 islands grown on the Ag/Ge(111)-√3×√3 surface by analyzing scanning tunneling microscopy images. We have found that the Co-2×2 islands commonly adopt a more compact arrangement as compared to that of the Ge(111) substrate, however they differ in a degree of an atomic compactness. We have not found a distinct relation between strain–relaxation and the island...
By means of room temperature scanning tunneling spectroscopy (RT STS), we have studied the electronic structure of two different Ag/Ge(111) phases as well as Co islands grown on the √3×√3-Ag/Ge (111) forming either √13×√13 or 2×2 patterns. The spectrum obtained from 4×4-Ag/Ge(111) structure shows the existence of a shoulder at 0.7V which is also present in the electronic structure of the Ge(111)-c2×8...
Using STM, we have studied a mechanism of Co-2×2 island growth on Ag/Ge(111)-√3×√3 surface. The islands are found to have hcp structure and be oriented with (11–20) face. A model was inferred that the majority of them grow along [0001] crystallographic direction, which in STM images manifests itself by a lateral shift of Co atom rows in the topmost layer compared to that in underlying one.
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