Initial growth of silver on Ge(111) studied by scanning tunneling microscopy
1993 (English)In: Physical Review B, ISSN 01631829 (ISSN), Vol. 47, no 23, 15669-15674 p.Article in journal (Refereed) Published
Scanning tunneling microscopy (STM) has been used to study the Ge(111) surface after submonolayer depositions of Ag. At the lowest coverages a (4Ã—4) reconstruction, with small insets of a (3Ã—1) edge structure, is observed. Based on the STM images we propose a mixed Ag and Ge adatom structure for the (4Ã—4) reconstruction, in which the adatoms have local (1Ã—1) and (2Ã—2) arrangements corresponding to a Ag coverage of 6/16 monolayers. The (3Ã—1) structure appears to have a configuration similar to the Si(111)/Ag-(3Ã—1) reconstruction, although in this case it has a much more limited extension, restricted to a few unit cells in the near vicinity of step edges and phase boundaries. At higher coverages, after the completion of a full (4Ã—4)/(3Ã—1) surface, a (3 Ã— 3) R30Â°structure appears showing STM images similar to those previously published for the Si(111)/Ag system. Â© 1993 The American Physical Society.
Place, publisher, year, edition, pages
1993. Vol. 47, no 23, 15669-15674 p.
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:kth:diva-83046DOI: 10.1103/PhysRevB.47.15669OAI: oai:DiVA.org:kth-83046DiVA: diva2:498704
Correspondence Address: Hammar, M.; Department of Physics, Materials Science, Royal Institute of Technology, S-100 44 Stockholm, Sweden NR 201408052012-02-122012-02-122012-02-12Bibliographically approved