{
  "abstract": "Low-dimensional Dirac systems offer a versatile platform for quantum-geometric non-linear transport. Hexagonal warping in topological insulator (TI) surface states generates rich momentum-space geometric textures. However, mirror and time-reversal symmetries strictly constrain both the Berry curvature and quantum metric dipoles to zero. Here, we show that proximity-coupling a hexagonally warped TI to a d-wave altermagnet lifts spatial mirror symmetry via the interplay of C_{3v} warping and d-wave spin-splitting. This symmetry breaking enables finite Berry curvature dipole components, which, however, remain heavily suppressed near charge neutrality, establishing the intrinsic quantum metric dipole as the sole driver of the non-linear Hall response. This scattering-independent response vanishes at μ= 0 and exhibits odd parity under chemical potential inversion. Importantly, rotating the altermagnetic orientation angle ϕcontinuously tunes quantum metric dipole and induces a sign reversal, peaking near ϕ=0 and vanishing at ϕ= π/4. Our findings highlight TI-altermagnet interfaces as ideal candidates for gate- and orientation-tunable quantum metric spintronics.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.17001",
  "author_total": 1,
  "authors": [
    {
      "name": "Debashree Chowdhury"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5hrz767se9z8v.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.17001",
  "fulltext_url": null,
  "id": "5hrz767se9z8v",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.17001",
  "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.mes-hall"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "3107|Topological Materials and Phenomena"
    ]
  ],
  "openalex": "W7213403581",
  "pdf_url": "https://arxiv.org/pdf/2609.17001",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5hrz767se9z8v.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:41Z",
      "native_id": "2609.17001",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.17001"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Nonlinear Hall Effect in Altermagnetic Warped Topological Insulators",
  "title_text": "Nonlinear Hall Effect in Altermagnetic Warped Topological Insulators",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:41Z",
  "url": "https://research.draconitic.com/paper/5hrz767se9z8v",
  "venue": "arXiv",
  "versions": []
}