{
  "abstract": "The magnetotropic susceptibility, $k(ω)$, probes ultra-low-frequency uniform ($\\boldsymbol{q}=0$) spin and charge fluctuations in a crystal mounted on an oscillating cantilever: its real part shifts the oscillation frequency, while its imaginary part characterises the induced damping. We derive $k(ω)$ within linear response theory for a generic correlated-electron Hamiltonian, showing that its real part is sensitive to magnetic anisotropy and its imaginary part encodes the uniform dynamical spin susceptibility, even for spin-symmetric insulators, while in metals it reveals eddy-current damping conditions. Using auxiliary-field quantum Monte Carlo, we compute $k(ω)$ for microscopic models of $α$-RuCl$_3$, finding that the low-temperature $k(ω=0)/T$ scaling with $B/T$ is a signature of dominant Kitaev coupling, robust to optical phonons, while the dynamical response shows local-moment-like features. We highlight applications to Kondo destruction quantum criticality, relevant to strange metallicity and unconventional superconductivity.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2605.00568",
  "author_total": 11,
  "authors": [
    {
      "name": "João C. Inácio"
    },
    {
      "name": "J. Schwab"
    },
    {
      "name": "G. Rakhmanova"
    },
    {
      "name": "S. Safari"
    },
    {
      "name": "V. Zambra"
    },
    {
      "name": "H. Nasir"
    },
    {
      "name": "S. Khim"
    },
    {
      "name": "S. Paschen"
    },
    {
      "name": "K. A. Modic"
    },
    {
      "name": "Fakher F. Assaad"
    },
    {
      "name": "Toshihiro Sato"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/efjgjmw9rx58c.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.00568",
  "fulltext_url": null,
  "id": "efjgjmw9rx58c",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.00568",
  "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": "W7160194444",
  "pdf_url": "https://arxiv.org/pdf/2605.00568",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/efjgjmw9rx58c.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:19Z",
      "native_id": "2605.00568",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.00568"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Dynamical magnetotropic susceptibility as a new probe of Kitaev materials and beyond",
  "title_text": "Dynamical magnetotropic susceptibility as a new probe of Kitaev materials and beyond",
  "type": "preprint",
  "updated_at": "2026-10-30T12:22:19Z",
  "url": "https://research.draconitic.com/paper/efjgjmw9rx58c",
  "venue": "arXiv",
  "versions": []
}