ISIS Neutron and Muon Source Data Journal

Pressure-induced O(2) quantum phase transition in a quantum antiferromagnet

Abstract: Quantum phase transitions (QPT) continue to attract the attention of experimentalists and theorists alike. Experiments on quantum magnets have been crucial to understand their underlying physics. Famous examples include the Bose-Einstein condensation of magnons (which spontaneously breaks O(2) or the isomorphic U(1) symmetry, dynamical critical exponent z = 2), the Ising chain in transverse fields (emergent E8 symmetry), and the pressure-induced QPT in TlCuCl3 (O(3), z = 1) which displays a longitudinal Higgs excitation. Here we propose to perform time-of-flight spectroscopy on what we believe is the first realization of a 3D O(2)-breaking z = 1 QPT in the material dichloro-tetrakis-thiourea-nickel (DTN), in which we have recently discovered a pressure-induced quantum critical point (QCP) at around 1 kbar.

Principal Investigator: Dr Johannes Moeller
Experimenter: Mr Gerard Perren
Experimenter: Professor Andrey Zheludev
Experimenter: Mr Gediminas Simutis
Local Contact: Dr Tatiana Guidi

DOI: 10.5286/ISIS.E.RB1510091

ISIS Experiment Number: RB1510091

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 Johannes Moeller et al; (2015): Pressure-induced O(2) quantum phase transition in a quantum antiferromagnet, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1510091

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