{
  "abstract": "Electrical transport in non-centrosymmetric materials exhibits a nonlinear conductivity tensor component that generates second-harmonic voltages in response to applied electric fields. Harnessing this effect is essential for developing zero-threshold electromagnetic energy harvesters and broadband frequency upconverters, both of which require maximizing the nonlinear responsivity. Here, we demonstrate that inhomogeneously strained macroscopic slabs of the topological insulator Bi$_2$Se$_3$ achieve a record-high nonlinear responsivity of $10^4\\,μ$m/V: a six orders of magnitude boost compared to its thin-film counterparts. We attribute this giant enhancement to a classical geometric nonlinear transport effect, which is driven by complex strain gradients within the bulk material. Notably, a similar geometric mechanism known as geometric nonlinear Hall was previously observed only in microscale-patterned structures. Our findings establish macroscopic strain engineering as a powerful route to enhance nonlinear transport, with immediate relevance to a broad class of layered systems, including transition metal dichalcogenides and moiré heterostructures.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.13542",
  "author_total": 16,
  "authors": [
    {
      "name": "Igor Veremchuk"
    },
    {
      "name": "Pavlo Makushko"
    },
    {
      "name": "Anita Guarino"
    },
    {
      "name": "Muhammad Waqee Ur Rehman"
    },
    {
      "name": "Rosalba Tatiana Fittipaldi"
    },
    {
      "name": "Tobias Kosub"
    },
    {
      "name": "Alexej Pashkin"
    },
    {
      "name": "Fabian Ganss"
    },
    {
      "name": "Oleg A. Petrenko"
    },
    {
      "name": "Proloy T. Das"
    },
    {
      "name": "Rui Xu"
    },
    {
      "name": "Rhonald Burgos Atencia"
    },
    {
      "name": "Debottam Mandal"
    },
    {
      "name": "Antonio Vecchione"
    },
    {
      "name": "Carmine Ortix"
    },
    {
      "name": "Denys Makarov"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9smhecgy4rv5c.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.13542",
  "fulltext_url": null,
  "id": "9smhecgy4rv5c",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.13542",
  "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",
      "cond-mat.mtrl-sci"
    ],
    [
      "openalex",
      "3107|Topological Materials and Phenomena"
    ]
  ],
  "openalex": "W7221520686",
  "pdf_url": "https://arxiv.org/pdf/2610.13542",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-09",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/9smhecgy4rv5c.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:28:36Z",
      "native_id": "2610.13542",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.13542"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Giant geometric nonlinear transport in inhomogeneously strained Bi$_2$Se$_3$ single crystalline slabs",
  "title_text": "Giant geometric nonlinear transport in inhomogeneously strained Bi_2Se_3 single crystalline slabs",
  "type": "preprint",
  "updated_at": "2026-10-30T12:28:36Z",
  "url": "https://research.draconitic.com/paper/9smhecgy4rv5c",
  "venue": "arXiv",
  "versions": []
}