{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Acharyya P"],"funding":["DST | Science and Engineering Research Board (SERB)","Department of Science and Technology, Ministry of Science and Technology (DST)"],"pagination":["5053"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC9420152"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["13(1)"],"pubmed_abstract":["As the periodic atomic arrangement of a crystal is made to a disorder or glassy-amorphous system by destroying the long-range order, lattice thermal conductivity, κ<sub>L</sub>, decreases, and its fundamental characteristics changes. The realization of ultralow and unusual glass-like κ<sub>L</sub> in a crystalline material is challenging but crucial to many applications like thermoelectrics and thermal barrier coatings. Herein, we demonstrate an ultralow (~0.20 W/m·K at room temperature) and glass-like temperature dependence (2-400 K) of κ<sub>L</sub> in a single crystal of layered halide perovskite, Cs<sub>3</sub>Bi<sub>2</sub>I<sub>6</sub>Cl<sub>3</sub>. Acoustic phonons with low cut-off frequency (20 cm<sup>-1</sup>) are responsible for the low sound velocity in Cs<sub>3</sub>Bi<sub>2</sub>I<sub>6</sub>Cl<sub>3</sub> and make the structure elastically soft. While a strong anharmonicity originates from the low energy and localized rattling-like vibration of Cs atoms, synchrotron X-ray pair-distribution function evidence a local structural distortion in the Bi-halide octahedra and Cl vacancy. The hierarchical chemical bonding and soft vibrations from selective sublattice leading to low κ<sub>L</sub> is intriguing from lattice dynamical perspective as well as have potential applications."],"journal":["Nature communications"],"pubmed_title":["Glassy thermal conductivity in Cs<sub>3</sub>Bi<sub>2</sub>I<sub>6</sub>Cl<sub>3</sub> single crystal."],"pmcid":["PMC9420152"],"funding_grant_id":["CRG/2018/002197","DST/SJF/CSA-02/2018-19","SB/SJF/2019-20/06"],"pubmed_authors":["Ghosh T","Pal K","Acharyya P","Swain D","Rana KS","Soni A","Dutta M","Biswas K","Etter M","Waghmare UV"],"additional_accession":[]},"is_claimable":false,"name":"Glassy thermal conductivity in Cs<sub>3</sub>Bi<sub>2</sub>I<sub>6</sub>Cl<sub>3</sub> single crystal.","description":"As the periodic atomic arrangement of a crystal is made to a disorder or glassy-amorphous system by destroying the long-range order, lattice thermal conductivity, κ<sub>L</sub>, decreases, and its fundamental characteristics changes. The realization of ultralow and unusual glass-like κ<sub>L</sub> in a crystalline material is challenging but crucial to many applications like thermoelectrics and thermal barrier coatings. Herein, we demonstrate an ultralow (~0.20 W/m·K at room temperature) and glass-like temperature dependence (2-400 K) of κ<sub>L</sub> in a single crystal of layered halide perovskite, Cs<sub>3</sub>Bi<sub>2</sub>I<sub>6</sub>Cl<sub>3</sub>. Acoustic phonons with low cut-off frequency (20 cm<sup>-1</sup>) are responsible for the low sound velocity in Cs<sub>3</sub>Bi<sub>2</sub>I<sub>6</sub>Cl<sub>3</sub> and make the structure elastically soft. While a strong anharmonicity originates from the low energy and localized rattling-like vibration of Cs atoms, synchrotron X-ray pair-distribution function evidence a local structural distortion in the Bi-halide octahedra and Cl vacancy. The hierarchical chemical bonding and soft vibrations from selective sublattice leading to low κ<sub>L</sub> is intriguing from lattice dynamical perspective as well as have potential applications.","dates":{"release":"2022-01-01T00:00:00Z","publication":"2022 Aug","modification":"2025-04-18T19:06:51.397Z","creation":"2025-04-07T06:48:14.587Z"},"accession":"S-EPMC9420152","cross_references":{"pubmed":["36030224"],"doi":["10.1038/s41467-022-32773-4"]}}