{
  "abstract": "Van Hove (vH) singularities can enhance superconductivity by generating a large pairing susceptibility. Yet, it remains challenging to experimentally establish whether pairing really occurs near these points. We show that the saddle-point dispersion near a vH point gives rise to a `light-cone' vH-selective behavior of Friedel oscillations, which is drastically different from the familiar concentric circles. Each vH point maps onto its own real-space light-cone sector, allowing STM around a single impurity to measure whether---and how strongly---that saddle-point quasiparticle sector is gapped. A superconducting gap near vH points suppresses the oscillations in the directions corresponding to peaks in the gap function angular dependence, a behavior that provides a signature of vH-related pairing at STM-accessible length scales. This STM protocol, targeting vH superconductivity, is capable of determining whether superconducting pairing emerges near the vH points or elsewhere on the Fermi surface.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.40648",
  "author_total": 3,
  "authors": [
    {
      "name": "Archisman Panigrahi"
    },
    {
      "name": "Vladislav Poliakov"
    },
    {
      "name": "Leonid Levitov"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8c5f6nc7z3qtn.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.40648",
  "fulltext_url": null,
  "id": "8c5f6nc7z3qtn",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.40648",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mes-hall"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.40648",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8c5f6nc7z3qtn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:28Z",
      "native_id": "2610.40648",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.40648"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Light-Cone Friedel Oscillations: a Window into van Hove Superconductivity",
  "title_text": "Light-Cone Friedel Oscillations: a Window into van Hove Superconductivity",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:47Z",
  "url": "https://research.draconitic.com/paper/8c5f6nc7z3qtn",
  "venue": "arXiv",
  "versions": []
}