Strain relief through heterophase interface reconstruction: Ag(111)/Ru(0001)

We report an experimental (scanning tunneling microscopy) and theoretical (embedded atom method) study of a heterophase interface reconstruction between Ag(111) and Ru(0001). Despite the large 7% mismatch, the second layer of Ag from the Ru exhibits a hexagonal structure with Ag bulk spacing, provid...

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Bibliographic Details
Published in:Physical review letters 2004-03, Vol.92 (11), p.116102.1-116102.4, Article 116102
Main Authors: LING, W. L, DE LA FIGUERA, J, BARTELT, N. C, HWANG, R. Q, SCHMID, A. K, THAYER, G. E, HAMILTON, J. C
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Interface structure and roughness
Physics
Solid surfaces and solid-solid interfaces
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
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Summary:We report an experimental (scanning tunneling microscopy) and theoretical (embedded atom method) study of a heterophase interface reconstruction between Ag(111) and Ru(0001). Despite the large 7% mismatch, the second layer of Ag from the Ru exhibits a hexagonal structure with Ag bulk spacing, providing a close match to bulk Ag. The first layer of Ag (next to Ru) is reconstructed in a highly symmetrical and regular structure containing monolayer long threading dislocations. We argue that this structure may generally occur to relieve strain in a certain class of heterophase interfaces.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.92.116102