ISIS Neutron and Muon Source Data Journal

Proximate quantum spin liquid ground state in the triangular lattice antiferromagnet TmTa7O19 with non-Kramers ion

Abstract: A quantum spin liquid (QSL) represents a novel quantum state of matter wherein frustration-induced quantum fluctuations preclude conventional symmetry-breaking even at T?0, enabling long-range entanglement and supporting exotic fractional excitations ideal for quantum computing [1]. The triangular lattice antiferromagnet provides a simple prototype to achieve frustration-driven quantum phenomena including QSL. In this context, we focus on a triangular lattice compound based on a non-Kramers ion. Our initial thermodynamic measurements reveal the absence of long-range magnetic order down to 0.15 K. Interestingly, the specific heat data exhibits a crossover around 2 K: below this temperature, a power-law behavior suggests the emergence of correlated magnetism, while above 2 K, an exponential behavior indicates a gap associated with crystal electric field excitations. To probe the underlying spin dynamics in detail, we propose to perform ?SR measurements down to 50 mK.

Principal Investigator: Mr Joydev Khatua
Experimenter: Professor KwangYong Choi
Local Contact: Dr John Wilkinson
Experimenter: Mr TaeYun Kim
Experimenter: Dr Panchanana Khuntia

DOI: 10.5286/ISIS.E.RB2520079

ISIS Experiment Number: RB2520079

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:
Mr Joydev Khatua et al; (2025): Proximate quantum spin liquid ground state in the triangular lattice antiferromagnet TmTa7O19 with non-Kramers ion, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2520079

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