{
  "abstract": "The question of a possible quantum critical point lying inside of a superconducting phase is central for understanding unconventional superconductivity. In various unconventional superconductors, non-Fermi-liquid/'strange-metal' $T^{n}$ variations, with $n<2$, of the electrical resistivity have been identified as the signature of magnetic quantum criticality. However, a difficulty is to prove experimentally that a non-Fermi-liquid/'strange-metal' law identified at temperatures above the superconducting temperature is the signature of an intrinsic zero-temperature quantum critical regime. In the heavy-fermion paramagnet UTe$_2$, unconventional superconductivity develops in the vicinity of a metamagnetic quantum phase transition induced by a magnetic field, and the quantum critical magnetic properties are suspected to play a role for the superconducting mechanism. In this work, we present a comparative analysis of electrical resistivity data collected on two UTe$_2$ samples of different qualities, in magnetic fields tilted by angles $θ\\simeq35-40$~$^\\circ$ from $\\mathbf{b}$ to $\\mathbf{c}$. Fits to the data have been performed either with a Fermi-liquid function $ρ=ρ_0+AT^{2}$ or with a non-Fermi-liquid/'strange-metal' function $ρ=ρ_0+A_nT^n$. Near to a superconducting phase induced beyond 40~T, non-physical residual resistivities $ρ_0<0$ are extracted from the $T^n$ fits, revealing that a 'hidden' Fermi-liquid $T^2$ regime may be ultimately recovered at low temperature. The results obtained here highlight the importance to investigate high-quality samples with low residual resistivity to confirm - or not - the presence of a suspected 'hidden' quantum critical behavior masked by superconductivity.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2604.14952",
  "author_total": 7,
  "authors": [
    {
      "name": "William Knafo"
    },
    {
      "name": "T. Thebault"
    },
    {
      "name": "K. Somesh"
    },
    {
      "name": "G. Lapertot"
    },
    {
      "name": "G. Knebel"
    },
    {
      "name": "D. Braithwaite"
    },
    {
      "name": "D. Aoki"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7ttz77vk3y515.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2604.14952",
  "fulltext_url": null,
  "id": "7ttz77vk3y515",
  "issns": [],
  "landing_url": "https://hal.science/hal-05845885v1",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.phys"
    ],
    [
      "openalex",
      "3104|Rare-earth and actinide compounds"
    ]
  ],
  "openalex": "W7154747458",
  "pdf_url": "https://arxiv.org/pdf/2604.14952",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7ttz77vk3y515.ris",
  "sources": [
    {
      "first_seen": "2026-10-31T12:20:56Z",
      "native_id": "hal-05845885",
      "source": "hal",
      "url": "https://hal.science/hal-05845885v1"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3104|Rare-earth and actinide compounds",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Fermi-liquid versus non-Fermi-liquid/'strange-metal' fits to the electrical resistivity in the quantum critical magnetic regime of an unconventional superconductor",
  "title_text": "Fermi-liquid versus non-Fermi-liquid/'strange-metal' fits to the electrical resistivity in the quantum critical magnetic regime of an unconventional superconductor",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:45Z",
  "url": "https://research.draconitic.com/paper/7ttz77vk3y515",
  "venue": "HAL",
  "versions": []
}