Thermal properties of BaCu2SnQ4(Q = S, Se) quaternary chalcogenides

Wilarachchige D.C.B. Gunatilleke; Andrew F. May; Hsin Wang; George S. Nolas

doi:10.1063/5.0013406

Thermal properties of BaCu₂SnQ₄(Q = S, Se) quaternary chalcogenides

Wilarachchige D.C.B. Gunatilleke, Andrew F. May, Hsin Wang, George S. Nolas

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Abstract

Quaternary chalcogenides form in different structure types and compositions and are of scientific interest, while their diversity of physical properties exemplifies why they continue to be investigated for potential technological applications. We investigate the thermal properties of BaCu2SnQ4 with trigonal (Q = S) and orthorhombic (Q = Se) crystal structures. BaCu2SnS2Se2 was also synthesized and characterized in order to investigate the effect of alloying on the thermal properties of these quaternary chalcogenides. The low thermal conductivity these materials possess originates from complex phonon spectra and local dynamics of distorted CuQ4 tetrahedra. Our results and analyses are presented in light of the ongoing fundamental interest in these materials as well as their continued interest for energy-related and opto-electronic applications.

Original language	English
Article number	092101
Journal	Applied Physics Letters
Volume	117
Issue number	9
DOIs	https://doi.org/10.1063/5.0013406
State	Published - Aug 31 2020

Funding

This work was supported by the National Science Foundation under Grant No. DMR-1748188. W.D.C.B.G. acknowledges the II-VI Foundation Block-Gift Program. H.W. acknowledges support of the International Energy Agency (IEA) Advanced Materials for Transportation and the Department of Energy Lightweight and Propulsion Materials program under the Vehicle Technologies Office. Specific heat measurements (A.F.M.) were supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Science and Engineering Division. Oak Ridge National Laboratory is managed by UT-Battelle LLC under Contract No. DE-AC05000OR22725.

Funders	Funder number
II-VI Foundation
Materials Science and Engineering Division
UT-Battelle LLC
National Science Foundation	1748188, DMR-1748188
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Oak Ridge National Laboratory
Division of Materials Sciences and Engineering
UT-Battelle	DE-AC05000OR22725
International Atomic Energy Agency
International Energy Agency

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abstract = "Quaternary chalcogenides form in different structure types and compositions and are of scientific interest, while their diversity of physical properties exemplifies why they continue to be investigated for potential technological applications. We investigate the thermal properties of BaCu2SnQ4 with trigonal (Q = S) and orthorhombic (Q = Se) crystal structures. BaCu2SnS2Se2 was also synthesized and characterized in order to investigate the effect of alloying on the thermal properties of these quaternary chalcogenides. The low thermal conductivity these materials possess originates from complex phonon spectra and local dynamics of distorted CuQ4 tetrahedra. Our results and analyses are presented in light of the ongoing fundamental interest in these materials as well as their continued interest for energy-related and opto-electronic applications.",

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AB - Quaternary chalcogenides form in different structure types and compositions and are of scientific interest, while their diversity of physical properties exemplifies why they continue to be investigated for potential technological applications. We investigate the thermal properties of BaCu2SnQ4 with trigonal (Q = S) and orthorhombic (Q = Se) crystal structures. BaCu2SnS2Se2 was also synthesized and characterized in order to investigate the effect of alloying on the thermal properties of these quaternary chalcogenides. The low thermal conductivity these materials possess originates from complex phonon spectra and local dynamics of distorted CuQ4 tetrahedra. Our results and analyses are presented in light of the ongoing fundamental interest in these materials as well as their continued interest for energy-related and opto-electronic applications.

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Thermal properties of BaCu₂SnQ₄(Q = S, Se) quaternary chalcogenides

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