ISIS Neutron and Muon Source Data Journal
This is a page describing data taken during an experiment at the ISIS Neutron and Muon Source. Information about the ISIS Neutron and Muon Source can be found at https://www.isis.stfc.ac.uk.
Revealing the Hamiltonian of the buckled zig-zag chain compound CaCoV2O7
Abstract: Anisotropic S=1/2 zig-zag chain compounds are of great interest for their ability to host exotic many-body quantum states and excitations. In the Ising J1-J2 chain, at J2/J1 <0.5 the ground state is expected to be a Neel antiferromagnet, whilst for J2/J1 > 0.5, UUDD order is stabilised. Little experimental or theoretical attention has been paid to this part of the phase diagram, in part due to the few material realisations. Recently, the zig-zag chain material CaCoV2O7 (CCVO) has been shown to host UUDD magnetic order below 3K, as well as a short-range ordered phase between 3 and 6K. Furthermore, in applied field, CCVO has been shown to undergo an unusually sharp quantum phase transition to a quantum paramagnet, with an exponent that differs from current theories. We propose to map out the zero field magnetic spectrum of CCVO across its different magnetic phases. These measurements will allow us to extract a microscopic spin Hamiltonian for CCVO which will shed light on both the unusual nature of the quantum critical point in the system and provide experimental insight on an underexplored region of the J1-J2 chain phase diagram.
Principal Investigator: Dr Harry Lane
Experimenter: Mr Sam Hanna-Kemper
Experimenter: Mr Thomas Jervis
Experimenter: Miss Athira K P
Experimenter: Dr Devashi Adroja
Experimenter: Dr Guratinder Kaur
Experimenter: Miss Josie Ball
Local Contact: Dr George Wood
Experimenter: Dr Masahiko Isobe
Experimenter: Dr Arvind Kumar Yogi
DOI: 10.5286/ISIS.E.RB2620477
ISIS Experiment Number: RB2620477
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| 10.5286/ISIS.E.RB2620477-1 | LET | 08 October 2029 | Download |
| 10.5286/ISIS.E.RB2620477-2 | ALF | 02 October 2029 | Download |
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 Harry Lane et al; (2026): Revealing the Hamiltonian of the buckled zig-zag chain compound CaCoV2O7, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2620477
Data is released under the CC-BY-4.0 license.
