ISIS Neutron and Muon Source Data Journal

Investigation of phonon anomalies in the CDW phases of 1T-TaS2

Abstract: 1T-TaS2, an archetypal quasi-2D compound, reveals strong electron-phonon (e-p) coupling responsible for charge-density-wave (CDW) instabilities leading to a series of phase transitions: from unmodulated structure into incommensurate CDW phase;then to nearly commensurate and finally to commensurate CDW state.Ta4+ ions adopt David star pattern,where 5d electrons on 12 of 13 ions form molecular orbitals leaving center ion with free S=1/2 spin.Despite huge interest in CDW phases,little is known about e-p coupling in TaS2.To our best knowledge no inelastic neutron experiment has yet been done on TaS2 which would otherwise reveal which particular phonon modes are involved at CDW transitions.We propose to investigate the temperature evolution of phonon density of states in 3 CDW phases by inelastic scattering using MARI with the aim of improving our understanding of e-p mechanism in CDW phases.

Principal Investigator: Mrs Marie Hruzova Kratochvilova
Experimenter: Dr Milan Klicpera
Experimenter: Dr Duc Le
Experimenter: Dr Sang-Wook Cheong
Experimenter: Professor Je-Geun Park

DOI: 10.5286/ISIS.E.RB1620013

ISIS Experiment Number: RB1620013

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:
Mrs Marie Hruzova Kratochvilova et al; (2017): Investigation of phonon anomalies in the CDW phases of 1T-TaS2, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1620013

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