ISIS Neutron and Muon Source Data Journal

Cu-ion mobility and lattice dynamics in the liquid-like phase of Cu2Se

Abstract: Thermoelectricity enables the conversion of waste heat into useful power, and it is becoming increasingly important for power recovery applications at high temperature, where thermoelectric performance is most efficient. Copper selenide has a simple crystal structure, and yet its thermal conductivity becomes comparable to that of a glass at temperatures above 800K, and this is very favourable for thermoelectric applications. The low thermal conductivity appears to be correlated with the onset of super-ionic diffusion of the copper ions above this temperature. We aim to test molecular dynamics simulations of the copper diffusion using quasi-elastic neutron scattering, and to relate this to changes in the lattice vibrations determined using inelastic neutron scattering, since these control the thermal conductivity.

Principal Investigator: Professor Jon Goff
Experimenter: Dr Rob Bewley
Experimenter: Dr David Voneshen

DOI: 10.5286/ISIS.E.RB1520284

ISIS Experiment Number: RB1520284

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:
Professor Jon Goff et al; (2015): Cu-ion mobility and lattice dynamics in the liquid-like phase of Cu2Se, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1520284

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