{
  "abstract": "We present the heat capacity of the frustrated sawtooth-chain compound atacamite Cu$_2$Cl(OH)$_3$ in high magnetic fields up to 35 T for $\\mathbf{H} \\parallel b$ axis. We clearly observe the change from antiferromagnetic long-range order, indicated by a sharp transition anomaly shifted to lower temperatures when increasing field, to a field-induced spin-liquid-like state with the absence of any transition anomaly. Here, in highest magnetic fields above 32 T a broad anomaly is present which is shifted to higher temperatures as the field is increased. The low-temperature heat capacity in the high-field region can be described well by an exponential behavior indicating a thermal activation over a spin gap. The findings are consistent with our scenario for the high-field state in atacamite for $\\mathbf{H} \\parallel c$ axis, where we proposed the sawtooth chains to decouple into two spin subsystems, basal and apical spin sites, leading to a partially polarized state with $M \\sim M_\\mathrm{sat}/2$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.39669",
  "author_total": 7,
  "authors": [
    {
      "name": "L. Stödter"
    },
    {
      "name": "A. Demuer"
    },
    {
      "name": "T. Kotte"
    },
    {
      "name": "A. U. B. Wolter"
    },
    {
      "name": "B. Büchner"
    },
    {
      "name": "K. C. Rule"
    },
    {
      "name": "S. Süllow"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/c17ys5d4zd9c1.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.39669",
  "fulltext_url": null,
  "id": "c17ys5d4zd9c1",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.39669",
  "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/2610.39669",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/c17ys5d4zd9c1.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:23Z",
      "native_id": "2610.39669",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.39669"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.str-el",
      "subfield": "condensed-matter"
    }
  ],
  "title": "High-Field Heat Capacity of Atacamite Cu$_2$Cl(OH)$_3$ for $\\mathbf{H} \\parallel b$ axis: From Antiferromagnetic Order to Correlated Disorder",
  "title_text": "High-Field Heat Capacity of Atacamite Cu_2Cl(OH)_3 for H ∥ b axis: From Antiferromagnetic Order to Correlated Disorder",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:45Z",
  "url": "https://research.draconitic.com/paper/c17ys5d4zd9c1",
  "venue": "arXiv",
  "versions": []
}