ISIS Neutron and Muon Source Data Journal

Field induced pinch points in the quantum spin liquid Ca10Cr7O28

Abstract: Ca10Cr7O28 is a quantum spin liquid – characterised by the absence of static magnetic order where the spins are in coherent dynamical motion in the ground state. This state originates from the frustrated breathing kagome bilayer lattice of spin-1/2 Cr5+ ions which hosts competing interactions. The excitations are broad and diffuse reminiscent of spinons, however in a magnetic field they sharpen into spin-waves modes. Three pairs of gapped modes exist, the lowest energy pair condenses into the ground state at low field and is responsible for the spiral spin liquid behaviour. Theory predicts that the other modes host unusual ’dynamical’ spin liquids which would give a kagome spin liquid characterised by a pinch-point pattern if they were to become gapless. The aim of this proposal is to test these ideas by measuring the gapped and dispersionless pinch point modes predicted at high fields.

Principal Investigator: Dr Alysia Lake
Experimenter: Dr Christian Balz
Experimenter: Dr Nic Shannon
Experimenter: Dr Nazmul Islam
Local Contact: Dr Rob Bewley
Experimenter: Ms Anna Fancelli

DOI: 10.5286/ISIS.E.RB1820065

ISIS Experiment Number: RB1820065

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 Alysia Lake et al; (2019): Field induced pinch points in the quantum spin liquid Ca10Cr7O28, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1820065

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