{
  "abstract": "Geometrically frustrated triangular-lattice antiferromagnets exhibit a delicate competition between magnetic order and quantum spin liquid (QSL) behavior, with the Yb-based delafossite family $A$Yb$X_2$ providing a structurally clean platform for exploring this physics. Here, we report a comprehensive study of single-crystal TlYbS$_2$ using DC magnetization, AC susceptibility, electron spin resonance (ESR), and specific heat measurements extending from room temperature to the millikelvin regime. Single-crystal X-ray diffraction confirms a trigonal $R\\bar{3}m$ structure comprising well-separated triangular layers of Yb$^{3+}$ ions with no detectable site disorder. At zero field, a weak thermodynamic anomaly is observed near $530$ mK, which may indicate the onset of a weakly ordered state similar to that reported in KYbSe$_2$. Below $300$ mK, the zero-field magnetic specific heat follows $C_{\\rm m}\\propto T^{1.8}$, close to a quadratic temperature dependence, in contrast to the linear temperature dependence reported for the sister compound TlYbSe$_2$, which has been described in terms of the interplay between spinons and thermally excited gauge-flux excitations. Magnetization and ESR measurements establish pronounced easy-plane magnetic anisotropy, with $g_\\perp/g_\\parallel \\approx 6.9$. The anomaly near $530$ mK exhibits a strongly anisotropic response to magnetic field. For $H\\perp c$, it remains visible up to approximately $2$ T and continuously evolves toward a field-induced ordered phase above approximately $2.5$ T, followed by a sequence of field-induced phases that includes a $1/3$ magnetization plateau between approximately $5$ and $8$ T and full polarization near $17$ T. In contrast, for $H\\parallel c$, the anomaly weakens and is suppressed near $3$ T, consistent with the recently reported confinement--deconfinement transition from an ordered state to a field-induced QSL.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.11881",
  "author_total": 11,
  "authors": [
    {
      "name": "Bishnu P. Belbase"
    },
    {
      "name": "Arjun Unnikrishnan"
    },
    {
      "name": "Piyush Chhallare"
    },
    {
      "name": "Mohan B. Neupane"
    },
    {
      "name": "Eun Sang Choi"
    },
    {
      "name": "Sebastian Erdmann"
    },
    {
      "name": "Muhammad U. Akbar"
    },
    {
      "name": "Mamoun Hemmida"
    },
    {
      "name": "H. -A. Krug von Nidda"
    },
    {
      "name": "Philipp Gegenwart"
    },
    {
      "name": "Arnab Banerjee"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4fv36zwyhnv81.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.11881",
  "fulltext_url": null,
  "id": "4fv36zwyhnv81",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.11881",
  "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.mtrl-sci"
    ],
    [
      "arxiv",
      "cond-mat.str-el"
    ],
    [
      "openalex",
      "3104|Advanced Condensed Matter Physics"
    ]
  ],
  "openalex": "W7212273502",
  "pdf_url": "https://arxiv.org/pdf/2609.11881",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4fv36zwyhnv81.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:50Z",
      "native_id": "2609.11881",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.11881"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Low temperature thermodynamics of $S_{\\mathrm{eff}}=1/2$ triangular lattice quantum spin liquid candidate TlYbS$_2$",
  "title_text": "Low temperature thermodynamics of S_eff=1/2 triangular lattice quantum spin liquid candidate TlYbS_2",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:50Z",
  "url": "https://research.draconitic.com/paper/4fv36zwyhnv81",
  "venue": "arXiv",
  "versions": []
}