ISIS Neutron and Muon Source Data Journal

Possible multipolar ordering in spin-orbital-entangled d2 system on a face-centred-cubic lattice

Abstract: We propose to perform muon spin rotation (muSR) measurements on tungsten chlorides A2WCl6 (A = K, Rb, Cs) with a face-centred-cubic (FCC) lattice of W4+ ions. Because of strong spin-orbit coupling, W4+ ions have spin-orbital-entangled Jeff = 2 state. When the Jeff = 2 state is placed on a FCC lattice, the emergence of multipolar ordering such as charge quadrupole and magnetic octupole ordering is theoretically predicted. A2WCl6 do not show a clear sign of magnetic order down to 2 K, and a structural transition is seen at 180 K only for K2WCl6. Their magnetic ground state thus remains elusive. In order to distinguish the possible ground states such as magnetic (pseudo-dipolar or octupolar) order, spin-singlet state with charge quadrupolar order or spin-glass, temperature and magnetic field dependent muSR measurements will be conducted on the three compounds.

Principal Investigator: Dr Tomohiro Takayama
Experimenter: Professor Hidenori Takagi
Experimenter: Dr Isao Watanabe
Local Contact: Dr Adam Berlie

DOI: 10.5286/ISIS.E.RB2070012

ISIS Experiment Number: RB2070012

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
Select the data format above to find out more about it.

Data Citation

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

For Example:
Dr Tomohiro Takayama et al; (2020): Possible multipolar ordering in spin-orbital-entangled d2 system on a face-centred-cubic lattice, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2070012

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