{
  "abstract": "The absence of magnetic Bragg peaks and a broad excitation continuum are commonly recognized experimental features of a quantum spin liquid. The Ce-based triangular-lattice hexaaluminate CeMgAl$_{11}$O$_{19}$ exhibits both signatures, yet its effective model and ground state remain under debate. Experiments have variously suggested a quantum spin liquid, proximate umbrella point, and disorder-suppressed magnetic order. Here we trace these contradictions to an overlooked multipolar degree of freedom: the transverse pseudospin of the $|\\pm5/2\\rangle$ Kramers doublet is a rank-5 triakontadipole rather than an ordinary dipole. Analyzing the magnetization, neutron spectra, and thermodynamics on equal footing, we establish a dipole-triakontadipole XXZ model with $J_{\\perp} \\simeq 0.65$ K and $J_c \\simeq -0.13$ K. The resulting planar triakontadipolar superfluid order is hidden from dipolar probes, explaining the absence of a magnetic Bragg peak in neutron scattering. The zero-field excitations separate into a low-energy triakontadipole wave and a broad higher-energy continuum. We further propose nuclear spin-lattice relaxation and spin-current experiments to probe the gapless excitations of this hidden triakontadipole superfluid. Our findings thus open a new avenue for high-rank multipolar physics in rare-earth triangular-lattice magnets.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.04845",
  "author_total": 7,
  "authors": [
    {
      "name": "Yu-Bo Liu"
    },
    {
      "name": "Yuan Gao"
    },
    {
      "name": "Zhen Ma"
    },
    {
      "name": "Shufan Cheng"
    },
    {
      "name": "Xinyang Liu"
    },
    {
      "name": "Jinsheng Wen"
    },
    {
      "name": "Wei Li"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0540zavknm4jt.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.04845",
  "fulltext_url": null,
  "id": "0540zavknm4jt",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.04845",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.str-el"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.04845",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0540zavknm4jt.ris",
  "sources": [
    {
      "first_seen": "2026-11-04T15:21:25Z",
      "native_id": "2611.04845",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.04845"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.str-el",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Hidden Triakontadipole Order in the Triangular-Lattice Magnet CeMgAl$_{11}$O$_{19}$",
  "title_text": "Hidden Triakontadipole Order in the Triangular-Lattice Magnet CeMgAl_11O_19",
  "type": "preprint",
  "updated_at": "2026-11-06T18:21:01Z",
  "url": "https://research.draconitic.com/paper/0540zavknm4jt",
  "venue": "arXiv",
  "versions": []
}