Importance of the Surface Electronic Structure in Heteroepitaxy

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Wormeester, H. and Huger, E. and Bauer, E. (1998) Importance of the Surface Electronic Structure in Heteroepitaxy. Physical Review Letters, 81 (4). pp. 854-857. ISSN 0031-9007

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Abstract:Thin Au and Pd films were deposited on a Nb(001) surface covered with a monolayer (ML) of the respective metal and on a S-terminated Nb. Although these ML's have the same lateral periodicity as the substrate, the films grown on them have a different structure. Films deposited on the metal-terminated Nb surface have a structure determined by the geometric misfit between substrate and deposit (Au bcc, Pd hcp) while all films grown on the S-terminated Nb surface are fcc with (111) orientation. Photoelectron spectroscopy shows that S changes the electron density of states at the surface in such a way that the bonding of the metal is weakened, resulting in nonwetting.
Item Type:Article
Copyright:© 1998 The American Physical Society
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/61210
Official URL:http://dx.doi.org/10.1103/PhysRevLett.81.854
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