ISIS Neutron and Muon Source Data Journal

Quantum spin liquid ground state in the Co-based triangular antiferromagnet Na2BaCo(PO4)2

Abstract: A triangular lattice occupies a special position in the quantum spin-liquid (QSL) physics. Although the triangular-lattice Heisenberg antiferromagnet is known to evade a QSL, several ingredients including exchange randomness, spin-orbit coupling, anisotropic and biquadratic exchange interactions have been controversially discussed as a route to stabilize QSLs. Recently, the Co-based triangular antiferromagnet Na2BaCo(PO4)2 has emerged as a new candidate for QSL, The triangular layers of Co2+ (jeff = 1/2) ions are separated by a single layer of nonmagnetic BaO12 polyhedra and stacked along c-axis. Our preliminary results defied magnetic and structural phase transitions down to 50 mK. Rather, the large residual magnetic entropy is retained at low temperatures, indicating abundant low-lying magnetic excitations. With the aid of muSR, we will corroborate a truly dynamic ground state.

Principal Investigator: Dr Suheon Lee
Experimenter: Dr Robert Cava
Experimenter: Dr Ruidan Zhong
Experimenter: Professor KwangYong Choi
Local Contact: Dr Adam Berlie

DOI: 10.5286/ISIS.E.RB1920237

ISIS Experiment Number: RB1920237

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 Suheon Lee et al; (2020): Quantum spin liquid ground state in the Co-based triangular antiferromagnet Na2BaCo(PO4)2, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1920237

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