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Kosterlitz-Thouless melting of magnetic order in the triangular quantum Ising material TmMgGaO4

Nature communications, 2020-02, Vol.11 (1), p.1111-1111, Article 1111 [Peer Reviewed Journal]

This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;The Author(s) 2020 ;ISSN: 2041-1723 ;EISSN: 2041-1723 ;DOI: 10.1038/s41467-020-14907-8 ;PMID: 32111829

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  • Title:
    Kosterlitz-Thouless melting of magnetic order in the triangular quantum Ising material TmMgGaO4
  • Author: Li, Han ; Liao, Yuan Da ; Chen, Bin-Bin ; Zeng, Xu-Tao ; Sheng, Xian-Lei ; Qi, Yang ; Meng, Zi Yang ; Li, Wei
  • Subjects: Fluids ; Helium ; Helium film ; Ising model ; Liquid helium ; Magnetic properties ; Mathematical models ; Permanent magnets ; Phase transitions ; Rare earth elements ; Rotons ; Superfluidity ; Two dimensional models
  • Is Part Of: Nature communications, 2020-02, Vol.11 (1), p.1111-1111, Article 1111
  • Description: Abstract Frustrated magnets hold the promise of material realizations of exotic phases of quantum matter, but direct comparisons of unbiased model calculations with experimental measurements remain very challenging. Here we design and implement a protocol of employing many-body computation methodologies for accurate model calculations—of both equilibrium and dynamical properties—for a frustrated rare-earth magnet TmMgGaO 4 (TMGO), which explains the corresponding experimental findings. Our results confirm TMGO is an ideal realization of triangular-lattice Ising model with an intrinsic transverse field. The magnetic order of TMGO is predicted to melt through two successive Kosterlitz–Thouless (KT) phase transitions, with a floating KT phase in between. The dynamical spectra calculated suggest remnant images of a vanishing magnetic stripe order that represent vortex–antivortex pairs, resembling rotons in a superfluid helium film. TMGO therefore constitutes a rare quantum magnet for realizing KT physics, and we further propose experimental detection of its intriguing properties.
  • Publisher: London: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 2041-1723
    EISSN: 2041-1723
    DOI: 10.1038/s41467-020-14907-8
    PMID: 32111829
  • Source: PubMed (Medline)
    ProQuest Central
    DOAJ Directory of Open Access Journals
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