{
  "abstract": "Electrical transport and magnetic measurements have been made on UTe₂ under pressure P up to ~16 GPa to determine the superconducting transition temperature Tc vs. P phase diagram in the high-pressure tetragonal phase. Superconductivity emerges near ~5 GPa, coincident with the orthorhombic-tetragonal phase transition; in the tetragonal phase, Tc reaches a maximum value of ~4 K at 6 GPa and then decreases with P and appears to vanish near 18 GPa. Tetragonal UTe₂ has a relatively small upper critical field Hc2(0) ≈ 1.2 T at 5.3 GPa, smaller than the Pauli paramagnetic limit, and is orbitally limited with a coherence length ξtetra ≈ 16.5 nm. This small value of Hc2(0) favors more conventional superconductivity; in contrast, the large values of Hc2(T) for orthorhombic UTe₂ exceed the Pauli paramagnetic limit in all three crystallographic directions and have been attributed to unconventional superconductivity, widely believed to involve spin-triplet pairing. The temperature-pressure phase diagram of UTe₂ shows a striking dichotomy: a narrow, fragile, unconventional superconducting region in the orthorhombic phase vs. a broad, robust, and more conventional superconducting dome in the tetragonal phase. This dichotomy is consistent with the proposal that U-dimers, present (absent) in the orthorhombic (tetragonal) phase, may play a role in spin-triplet superconductivity of orthorhombic UTe₂. In the tetragonal phase, the normal-state electrical resistivity ρ(T) exhibits metallic behavior with a \"knee\" at 200 to 240 K that depends weakly on P and most likely marks the onset of a transition to a magnetically ordered phase that coexists with superconductivity.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Physics, University of California San Diego, La Jolla, CA 92903.",
    "Department of Chemistry, Michigan State University, East Lansing, MI 48824."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 7,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Yuhang Deng",
      "orcid": "0000-0002-2937-0609"
    },
    {
      "affs": [
        0
      ],
      "name": "Gabriel Mee"
    },
    {
      "affs": [
        0
      ],
      "name": "Tyler Wannamaker"
    },
    {
      "affs": [
        0
      ],
      "name": "Keke Feng"
    },
    {
      "affs": [
        1
      ],
      "name": "Mingyu Xu"
    },
    {
      "affs": [
        1
      ],
      "name": "Weiwei Xie"
    },
    {
      "affs": [
        0
      ],
      "name": "M Brian Maple",
      "orcid": "0000-0002-5909-6057"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3a5vazsh7d1a7.bib",
  "cited_by": 0,
  "doi": "10.1073/pnas.2621369123",
  "fulltext_url": "https://europepmc.org/articles/PMC13684043",
  "id": "3a5vazsh7d1a7",
  "issns": [
    "0027-8424",
    "1091-6490"
  ],
  "landing_url": "https://europepmc.org/article/MED/42879485",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3104|Rare-earth and actinide compounds"
    ]
  ],
  "openalex": "W7222292602",
  "pdf_url": "https://europepmc.org/articles/PMC13684043?pdf=render",
  "pmcid": "PMC13684043",
  "pmid": "42879485",
  "published": "2026-10-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3a5vazsh7d1a7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:46Z",
      "native_id": "MED:42879485",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42879485"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3104|Rare-earth and actinide compounds",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Superconductivity in the high-pressure tetragonal phase of UTe₂.",
  "title_text": "Superconductivity in the high-pressure tetragonal phase of UTe₂.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:46Z",
  "url": "https://research.draconitic.com/paper/3a5vazsh7d1a7",
  "venue": "Proceedings of the National Academy of Sciences of the United States of America",
  "versions": []
}