---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
PlanS_conform: '1'
_id: '21845'
abstract:
- lang: eng
  text: UTe2 exhibits the remarkable phenomenon of re-entrant superconductivity, whereby
    the zero-resistance state reappears above 40 tesla after being suppressed with
    a field of around 10 tesla. One potential pairing mechanism, invoked in the related
    re-entrant superconductors UCoGe and URhGe, involves transverse fluctuations of
    a ferromagnetic order parameter. However, the requisite ferromagnetic order—present
    in both UCoGe and URhGe—is absent in UTe2, and neutron scattering shows instead
    that the magnetic susceptibility is peaked at an antiferromagnetic wavevector.
    Here, we measure the magnetotropic susceptibility of UTe2 across two field-angle
    planes. This quantity is sensitive to the magnetic susceptibility in a direction
    transverse to the applied magnetic field—a quantity that is not accessed in conventional
    magnetization measurements. We observe a very large decrease in the magnetotropic
    susceptibility over a broad range of field orientations, indicating a large increase
    in the transverse magnetic susceptibility. Because our technique probes the magnetic
    susceptibility in the long wavelength (q = 0) limit, this suggests that the strong
    transverse susceptibility arises from ferromagnetic spin fluctuations. These ferromagnetic
    fluctuations are likely important for understanding the pairing mechanism in UTe2,
    as all three superconducting phases of UTe2 surround this region of enhanced susceptibility
    in the field-angle phase diagram.
acknowledged_ssus:
- _id: NanoFab
acknowledgement: We appreciate technical support from Salvatore Bagiante, Evgeniia
  Volobueva, Lubuna Shafeek, Ali Bangura, and Zoltán Köllö, and scientific discussions
  with Daniel Agterberg, Johnpierre Paglione, Qimiao Si, Josephine Yu and Yue Yu.
  V.Z., A.N., M.N., and K.A.M. acknowledge funding received from the European Research
  Council (ERC) under the European Union’s Horizon 2020 research and innovation programme
  (TROPIC-101078696). V.Z., A.N., M.N., and K.A.M. thank the ISTA Nanofabrication
  Facility for technical support. B.J.R. acknowledges funding from the Office of Basic
  Energy Sciences of the United States Department of Energy under award number DE-SC0020143
  for data analysis and writing. The National High Magnetic Field Laboratory is supported
  by the National Science Foundation through NSF/DMR-2128556*, the State of Florida,
  and the U.S. Department of Energy. A.S. acknowledges support from the DOE/BES “Science
  of 100 T” grant. A.S. thanks Downtown Subscription in Santa Fe, NM, for their patience
  in hosting him. Sample preparation and characterization were supported by the NSF
  through DMR-2105191.
article_number: '3742'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Valeska
  full_name: Zambra, Valeska
  id: 467ed36b-dc96-11ea-b7c8-b043a380b282
  last_name: Zambra
  orcid: 0000-0002-8806-5719
- first_name: Amit
  full_name: Nathwani, Amit
  id: 1a362536-4d02-11f1-8543-8351136efc50
  last_name: Nathwani
- first_name: Muhammad
  full_name: Nauman, Muhammad
  id: 32c21954-2022-11eb-9d5f-af9f93c24e71
  last_name: Nauman
  orcid: 0000-0002-2111-4846
- first_name: Sylvia K.
  full_name: Lewin, Sylvia K.
  last_name: Lewin
- first_name: Corey E.
  full_name: Frank, Corey E.
  last_name: Frank
- first_name: Nicholas P.
  full_name: Butch, Nicholas P.
  last_name: Butch
- first_name: Arkady
  full_name: Shekhter, Arkady
  last_name: Shekhter
- first_name: B. J.
  full_name: Ramshaw, B. J.
  last_name: Ramshaw
- first_name: Kimberly A
  full_name: Modic, Kimberly A
  id: 13C26AC0-EB69-11E9-87C6-5F3BE6697425
  last_name: Modic
  orcid: 0000-0001-9760-3147
citation:
  ama: Zambra V, Nathwani A, Nauman M, et al. Giant transverse magnetic fluctuations
    at the edge of re-entrant superconductivity in UTe2. <i>Nature Communications</i>.
    2026;17. doi:<a href="https://doi.org/10.1038/s41467-026-71899-7">10.1038/s41467-026-71899-7</a>
  apa: Zambra, V., Nathwani, A., Nauman, M., Lewin, S. K., Frank, C. E., Butch, N.
    P., … Modic, K. A. (2026). Giant transverse magnetic fluctuations at the edge
    of re-entrant superconductivity in UTe2. <i>Nature Communications</i>. Springer
    Nature. <a href="https://doi.org/10.1038/s41467-026-71899-7">https://doi.org/10.1038/s41467-026-71899-7</a>
  chicago: Zambra, Valeska, Amit Nathwani, Muhammad Nauman, Sylvia K. Lewin, Corey
    E. Frank, Nicholas P. Butch, Arkady Shekhter, B. J. Ramshaw, and Kimberly A Modic.
    “Giant Transverse Magnetic Fluctuations at the Edge of Re-Entrant Superconductivity
    in UTe2.” <i>Nature Communications</i>. Springer Nature, 2026. <a href="https://doi.org/10.1038/s41467-026-71899-7">https://doi.org/10.1038/s41467-026-71899-7</a>.
  ieee: V. Zambra <i>et al.</i>, “Giant transverse magnetic fluctuations at the edge
    of re-entrant superconductivity in UTe2,” <i>Nature Communications</i>, vol. 17.
    Springer Nature, 2026.
  ista: Zambra V, Nathwani A, Nauman M, Lewin SK, Frank CE, Butch NP, Shekhter A,
    Ramshaw BJ, Modic KA. 2026. Giant transverse magnetic fluctuations at the edge
    of re-entrant superconductivity in UTe2. Nature Communications. 17, 3742.
  mla: Zambra, Valeska, et al. “Giant Transverse Magnetic Fluctuations at the Edge
    of Re-Entrant Superconductivity in UTe2.” <i>Nature Communications</i>, vol. 17,
    3742, Springer Nature, 2026, doi:<a href="https://doi.org/10.1038/s41467-026-71899-7">10.1038/s41467-026-71899-7</a>.
  short: V. Zambra, A. Nathwani, M. Nauman, S.K. Lewin, C.E. Frank, N.P. Butch, A.
    Shekhter, B.J. Ramshaw, K.A. Modic, Nature Communications 17 (2026).
corr_author: '1'
date_created: 2026-05-10T22:02:15Z
date_published: 2026-04-29T00:00:00Z
date_updated: 2026-05-11T06:36:00Z
day: '29'
ddc:
- '530'
department:
- _id: KiMo
- _id: GradSch
doi: 10.1038/s41467-026-71899-7
external_id:
  arxiv:
  - '2506.08984'
file:
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  date_created: 2026-05-11T06:32:12Z
  date_updated: 2026-05-11T06:32:12Z
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file_date_updated: 2026-05-11T06:32:12Z
has_accepted_license: '1'
intvolume: '        17'
language:
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month: '04'
oa: 1
oa_version: Published Version
project:
- _id: bd968c70-d553-11ed-ba76-cde40b0aba64
  grant_number: '101078696'
  name: Gaining leverage with spin liquids and superconductors
publication: Nature Communications
publication_identifier:
  eissn:
  - 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
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    status: public
scopus_import: '1'
status: public
title: Giant transverse magnetic fluctuations at the edge of re-entrant superconductivity
  in UTe2
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 17
year: '2026'
...