{
  "abstract": "Two-dimensional superconductors test our understanding of quantum phases. Low-temperature \"anomalous metal\" states are widely observed where conventional theories predict only superconducting or insulating ground states. In model systems based on proximity-coupled Josephson junction arrays, the critical temperature falls far faster with decreasing normal-state conductance than predicted by existing models. Whether these observations indicate a new quantum phase, a need to refine models of disorder and fluctuations, or both remains unresolved. Using scanning magnetic susceptometry, we image the local superfluid phase stiffness $ρ_s$ in gate-tunable Josephson junction arrays consisting of epitaxial Al islands on an InAs quantum well. Across six arrays and more than two orders of magnitude in the zero-temperature phase stiffness $ρ_{s0}$, the diamagnetic critical temperature $T_{c,φ}$ is suppressed more strongly than can be explained solely by thermal phase fluctuations, scaling approximately as $T_{c,φ}\\proptoρ_{s0}^{0.3}$. While $ρ_s$ is remarkably uniform at high carrier densities, at low carrier densities we find that anomalous metal transport emerges together with large-scale inhomogeneity that transport alone cannot directly detect. These results are inconsistent with a classical XY description within standard junction models, instead pointing to quantum fluctuations that suppress superconductivity throughout the superconducting phase and amplify inhomogeneity near the superconductor-insulator transition, producing anomalous metal behavior.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.28837",
  "author_total": 6,
  "authors": [
    {
      "name": "Logan Bishop-Van Horn"
    },
    {
      "name": "Teng Zhang"
    },
    {
      "name": "Sara Metti"
    },
    {
      "name": "Tyler Lindemann"
    },
    {
      "name": "Michael J. Manfra"
    },
    {
      "name": "Kathryn A. Moler"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ap8zzqmjxq5d7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.28837",
  "fulltext_url": null,
  "id": "ap8zzqmjxq5d7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.28837",
  "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.supr-con"
    ],
    [
      "openalex",
      "3104|Physics of Superconductivity and Magnetism"
    ]
  ],
  "openalex": "W7214307140",
  "pdf_url": "https://arxiv.org/pdf/2609.28837",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/ap8zzqmjxq5d7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:11Z",
      "native_id": "2609.28837",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.28837"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Imaging how fluctuations destroy superconductivity in two dimensions",
  "title_text": "Imaging how fluctuations destroy superconductivity in two dimensions",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:11Z",
  "url": "https://research.draconitic.com/paper/ap8zzqmjxq5d7",
  "venue": "arXiv",
  "versions": []
}