Influence of cationic ordering on the lattice dynamics of monoclinic Cu5Sn2S7 and cubic Cu5Sn2S6.65Cl0.35 sulfides
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00601618" target="_blank" >RIV/68378271:_____/24:00601618 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1021/acs.jpcc.4c03489" target="_blank" >https://doi.org/10.1021/acs.jpcc.4c03489</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.jpcc.4c03489" target="_blank" >10.1021/acs.jpcc.4c03489</a>
Alternative languages
Result language
angličtina
Original language name
Influence of cationic ordering on the lattice dynamics of monoclinic Cu5Sn2S7 and cubic Cu5Sn2S6.65Cl0.35 sulfides
Original language description
Cu2SnS3 is the parent compound of a series of phases in the Cu2+xSn1–xS3 section (0≤x≤0.15) of the ternary Cu–Sn–S phase diagram, the crystal structure of which can be controlled by varying the synthesis process and/or through a fine-tuning of the chemical composition. We investigate the lattice dynamics of the monoclinic ordered Cu5Sn2S7 and cubic disordered Cu5Sn2S6.65Cl0.35 compounds by temperature-dependent powder inelastic neutron scattering (INS) and heat capacity measurements. We show that the significant lowering of the lattice thermal conductivity in cubic Cu5Sn2S6.65Cl0.35 is due to a reduced phonon mean free path tied to the increased level of disorder in the unit cell. These results highlight how the stabilization of highly symmetric, yet strongly disordered crystal structures akin to those observed in high-entropy alloys, can lead to a drastic reduction in the heat transport, offering an effective approach to design high-performance thermoelectric sulfides.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Physical Chemistry C
ISSN
1932-7447
e-ISSN
1932-7455
Volume of the periodical
128
Issue of the periodical within the volume
33
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
14075-14084
UT code for WoS article
001287550300001
EID of the result in the Scopus database
2-s2.0-85201056735