{
  "abstract": "Monolayer FeSe on SrTiO$_3$ exhibits high-temperature superconductivity with an electron-only Fermi surface, raising fundamental questions about its unconventional pairing mechanism. Motivated by recent Josephson scanning tunneling microscopy evidence for nodeless $d$-wave superconductivity, we investigate the microscopic role of the Fe $d_{xy}$ orbital using an experimentally constrained multiorbital theory. A tight-binding model fitted to quasiparticle interference and angle-resolved photoemission spectroscopy reveals substantial $d_{xy}$ character near the Fermi level and dominant nearest-neighbor hopping, in contrast to the conventional kinetic-frustration picture of iron-based superconductors. Both itinerant spin-fluctuation calculations and strong-coupling exchange approaches favor a robust $d$-wave pairing state, whose interband pairing components allow a fully gapped quasiparticle spectrum. We further establish a symmetry-based selection rule for spatial Josephson tunneling, revealing characteristic bond-centered maxima and mirror-enforced interference zeros that distinguish $d$-wave pairing from competing $s$-wave states. These symmetry-enforced nodal lines survive near Fe-site impurities, while a pronounced contrast between the $d$- and $s$-wave Josephson patterns persists around vortices despite the loss of mirror protection. Our results connect the unconventional $d_{xy}$ electronic structure to nodeless $d$-wave superconductivity and demonstrate the power of spatial Josephson interference for resolving pairing symmetry in multiorbital superconductors.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.08037",
  "author_total": 4,
  "authors": [
    {
      "name": "Jiong Mei"
    },
    {
      "name": "Lili Wang"
    },
    {
      "name": "Yu-Jie Sun"
    },
    {
      "name": "Kun Jiang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/34b7kqzqaetg7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.08037",
  "fulltext_url": null,
  "id": "34b7kqzqaetg7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.08037",
  "language": null,
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "arxiv",
      "cond-mat.str-el"
    ],
    [
      "arxiv",
      "cond-mat.supr-con"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.08037",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/34b7kqzqaetg7.ris",
  "sources": [
    {
      "first_seen": "2026-11-06T18:21:30Z",
      "native_id": "2611.08037",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.08037"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Microscopic Origin and Josephson Signatures of $d$-Wave Superconductivity in Monolayer FeSe",
  "title_text": "Microscopic Origin and Josephson Signatures of d-Wave Superconductivity in Monolayer FeSe",
  "type": "preprint",
  "updated_at": "2026-11-09T00:20:41Z",
  "url": "https://research.draconitic.com/paper/34b7kqzqaetg7",
  "venue": "arXiv",
  "versions": []
}