ISIS Neutron and Muon Source Data Journal

Origin of Glassy Thermal Conductivity in Cs3Bi2I6Cl3 Single Crystal: An Inelastic Neutron Scattering Study

Abstract: Crystalline materials which exhibit unusual glass-like temperature variations of lattice thermal conductivity (?L) are essential in terms of their application in thermoelectrics. But it was a great challenge to observe glass-like thermal conductivity in a single crystal without the presence of impurity and disorder. Finding the origin behind the glassy thermal conductivity in a single crystal would not only be fascinating from the viewpoint of chemical bonding and lattice dynamics but would have great technological importance. Recently we have demonstrated an ultralow (~0.20 W/m·K at room temperature) and glass-like temperature dependence (2?400 K) of ?L in a single crystal of layered halide perovskite, Cs3Bi2I6Cl3. We now propose to investigate this unusual phonon properties observed in Cs3Bi2I6Cl3 in more detail, to validate our first-principles calculations and to study the phonon mode-specific damping as a function of temperature in Cs3Bi2I6Cl3 using inelastic neutron scattering.

Local Contact: Dr David Voneshen
Experimenter: Mr Debattam Sarkar
Experimenter: Mr Animesh Bhui
Experimenter: Dr Kanishka Biswas
Experimenter: Mr Animesh Das

DOI: 10.5286/ISIS.E.RB2310144

ISIS Experiment Number: RB2310144

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr David Voneshen et al; (2024): Origin of Glassy Thermal Conductivity in Cs3Bi2I6Cl3 Single Crystal: An Inelastic Neutron Scattering Study, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2310144

Data is released under the CC-BY-4.0 license.