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Turbostratic Disorder in [(Bi2Te3)x(TiTe2)y] Superlattices

Published online by Cambridge University Press:  01 February 2011

Fred R. Harris ,
Stacey Standridge ,
Carolyn Feik  and
David C. Johnson
Fred R. Harris
Affiliation:
Department of Chemistry, University of Oregon, Eugene, OR 97403
Stacey Standridge
Affiliation:
Department of Chemistry, University of Oregon, Eugene, OR 97403
Carolyn Feik
Affiliation:
Department of Chemistry, University of Oregon, Eugene, OR 97403
David C. Johnson
Affiliation:
Department of Chemistry, University of Oregon, Eugene, OR 97403
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Abstract

A family of metastable [(Bi2Te3)x(TiTe2)y] superlattices (where × and y denote the number of layers of each of the two components) was prepared by annealing modulated elemental reactant precursors at temperatures below 280°C. Structural analysis by traditional XRD shows the superlattice structures are highly aligned to the substrate with many orders of diffraction peaks from the c direction of the superlattice. Off-axis diffraction techniques presented in this paper suggest that the order between the layers in the a-b direction of these superlattice structures is turbostratic. In this type of behavior, the quasi two-dimensional crystals of Bi2Te3 and TiTe2 that comprise the superlattice structure lie like a deck of cards thrown in disarray on a surface. An analysis of the diffraction data leading to this conclusion is given.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 793: Symposium S – Thermoelectric Materials 2003 - Research and Applications , 2003 , S1.5
Copyright
Copyright © Materials Research Society 2004

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References

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