{
  "abstract": "A hidden low-temperature phase with possible loop-current order has been proposed in the kagome metals AV$_3$Sb$_5$ (A=K, Rb or Cs), but its experimental signatures remain subtle and indirect. Here, we use third-order nonlinear transport to probe this hidden phase in RbV$_3$Sb$_5$. At ~35 K, the longitudinal cubic response develops a strong kink and pronounced directional anisotropy with a strong departure from common relaxation time scaling, while the transverse cubic response acquires a magnetic field-odd component at the same temperature. Their coincident onset identifies the third-harmonic response as a sensitive marker of the low-temperature electronic reconstruction with time-reversal broken symmetry. Crucially, we find that the quantum metric quadrupole contributes directly to the longitudinal third-order response. In a loop-current charge-density-wave model, its direction selective enhancement captures the observed angular reconstruction. Our work shows how higher-order nonlinear transport translates subtle changes in electronic symmetry and quantum metric into measurable electrical signatures in quantum materials that is important for studying complex electronic phases of matter.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.36353",
  "author_total": 7,
  "authors": [
    {
      "name": "Jia-Chen Shi"
    },
    {
      "name": "Shupeng Xu"
    },
    {
      "name": "Utkarsh Khandelwal"
    },
    {
      "name": "Nashra Pistawala"
    },
    {
      "name": "Luminita Harnagea"
    },
    {
      "name": "Steven J. May"
    },
    {
      "name": "Ritesh Agarwal"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/650fhy5bp5zc7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.36353",
  "fulltext_url": null,
  "id": "650fhy5bp5zc7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.36353",
  "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": "W7214986084",
  "pdf_url": "https://arxiv.org/pdf/2609.36353",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/650fhy5bp5zc7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:31Z",
      "native_id": "2609.36353",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.36353"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Quantum metric induced nonlinear transport in the hidden loop-current phase of kagome metal RbV$_3$Sb$_5$",
  "title_text": "Quantum metric induced nonlinear transport in the hidden loop-current phase of kagome metal RbV_3Sb_5",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:31Z",
  "url": "https://research.draconitic.com/paper/650fhy5bp5zc7",
  "venue": "arXiv",
  "versions": []
}