Stacking sequences in close-packed metallic superlattices

The ground-state stacking sequences of superlattices formed from two dissimilar close-packed metals are studied within the context of a simple tight-binding model. The main result is that the chemical potential for a stacking fault is a Friedel-like, damped, oscillatory function of its distance away...

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Bibliographic Details
Published in:Physical review. B, Condensed matter Condensed matter, 1986-07, Vol.34 (2), p.1378-1380
Main Authors: REDFIELD, A. C, ZANGWILL, A. M
Format: Article
Language:English
Subjects:
Analysing. Testing. Standards
Applied sciences
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Measurement of properties and materials state
Metals. Metallurgy
Nondestructive testing
Physics
Solid surfaces and solid-solid interfaces
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
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Summary:The ground-state stacking sequences of superlattices formed from two dissimilar close-packed metals are studied within the context of a simple tight-binding model. The main result is that the chemical potential for a stacking fault is a Friedel-like, damped, oscillatory function of its distance away from a bimetallic interface. Accordingly, a superlattice compositional boundary can favor unusual stacking-fault configurations and the bulk stacking structure of the constituent metals may not be a good guide to the structure of the superlattice. Application is made to recent diffraction data for Ru--Ir superlattices. 15 ref.--AA
ISSN:0163-1829
1095-3795
DOI:10.1103/PhysRevB.34.1378