Atomic-scale interfacial structure in rock salt and tetradymite chalcogenide thermoelectric materials

D. L. Medlin; G. J. Snyder

doi:10.1007/s11837-012-0530-y

Atomic-scale interfacial structure in rock salt and tetradymite chalcogenide thermoelectric materials

D. L. Medlin, G. J. Snyder

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

Interfaces play important roles in the performance of nanostructured thermoelectric materials. However, our understanding of the atomic-scale structure of these interfaces is only beginning to emerge. In this overview article, we highlight and review several examples illustrating aspects of interfacial structure in the rock salt and tetradymite classes of chalcogenide materials. The chalcogenide compounds encompass some of the most successful and well-understood thermoelectric materials employed in actual application and are also relevant more broadly in diverse fields including phase-change memory materials, infrared radiation detection, and topological insulators. The examples we consider here focus in three areas: the influence of weak interlayer bonding on grain boundary structure in Bi₂Te₃, crystallographic alignment and interfacial coherency in rock salt and related cubic chalcogenides, and the structure of interfaces at tetradymite precipitates in a rock salt chalcogenide matrix. The complex interfaces in these systems can be understood and generalized by considering the similarities between the rock salt, tetradymite, and related structures and by analyzing of the relevant interfacial defects.

Original language	English (US)
Pages (from-to)	390-400
Number of pages	11
Journal	JOM
Volume	65
Issue number	3
DOIs	https://doi.org/10.1007/s11837-012-0530-y
State	Published - Mar 2013

Funding

The authors are grateful for many helpful and illuminating discussions with our colleagues concerning interfaces and phase stability in the chalcogenides. Particular acknowledgements go to J. Lensch-Falk, P. Sharma, J. Sugar, C. Spataru, and N. Yang at Sandia and to N. Heinz and T. Ikeda at Caltech. G.J.S. thanks the AFOSR-MURI program for funding. Sandia National Laboratories is a multiprogram laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy’s National Nuclear Security Administration under Contract DE-AC04-94AL85000. Support was provided in part by Sandia’s Laboratory-Directed Research and Development Program.

ASJC Scopus subject areas

General Materials Science
General Engineering

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10.1007/s11837-012-0530-y

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abstract = "Interfaces play important roles in the performance of nanostructured thermoelectric materials. However, our understanding of the atomic-scale structure of these interfaces is only beginning to emerge. In this overview article, we highlight and review several examples illustrating aspects of interfacial structure in the rock salt and tetradymite classes of chalcogenide materials. The chalcogenide compounds encompass some of the most successful and well-understood thermoelectric materials employed in actual application and are also relevant more broadly in diverse fields including phase-change memory materials, infrared radiation detection, and topological insulators. The examples we consider here focus in three areas: the influence of weak interlayer bonding on grain boundary structure in Bi2Te3, crystallographic alignment and interfacial coherency in rock salt and related cubic chalcogenides, and the structure of interfaces at tetradymite precipitates in a rock salt chalcogenide matrix. The complex interfaces in these systems can be understood and generalized by considering the similarities between the rock salt, tetradymite, and related structures and by analyzing of the relevant interfacial defects.",

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note = "Funding Information: The authors are grateful for many helpful and illuminating discussions with our colleagues concerning interfaces and phase stability in the chalcogenides. Particular acknowledgements go to J. Lensch-Falk, P. Sharma, J. Sugar, C. Spataru, and N. Yang at Sandia and to N. Heinz and T. Ikeda at Caltech. G.J.S. thanks the AFOSR-MURI program for funding. Sandia National Laboratories is a multiprogram laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy{\textquoteright}s National Nuclear Security Administration under Contract DE-AC04-94AL85000. Support was provided in part by Sandia{\textquoteright}s Laboratory-Directed Research and Development Program.",

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N2 - Interfaces play important roles in the performance of nanostructured thermoelectric materials. However, our understanding of the atomic-scale structure of these interfaces is only beginning to emerge. In this overview article, we highlight and review several examples illustrating aspects of interfacial structure in the rock salt and tetradymite classes of chalcogenide materials. The chalcogenide compounds encompass some of the most successful and well-understood thermoelectric materials employed in actual application and are also relevant more broadly in diverse fields including phase-change memory materials, infrared radiation detection, and topological insulators. The examples we consider here focus in three areas: the influence of weak interlayer bonding on grain boundary structure in Bi2Te3, crystallographic alignment and interfacial coherency in rock salt and related cubic chalcogenides, and the structure of interfaces at tetradymite precipitates in a rock salt chalcogenide matrix. The complex interfaces in these systems can be understood and generalized by considering the similarities between the rock salt, tetradymite, and related structures and by analyzing of the relevant interfacial defects.

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Atomic-scale interfacial structure in rock salt and tetradymite chalcogenide thermoelectric materials

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