Coexistence of superconductivity and ferromagnetism in URhGe
Abstract
The discovery of superconductivity at high pressure (albeit over a restricted range) in the ferromagnetic material UGe2 raised the possibility that bulk superconductivity might be found in other ferromagnets. The exact symmetry of the paired state and the dominant mechanism responsible for the pairing, however, remain unidentified. Meanwhile, the conjecture that superconductivity could occur more generally in ferromagnets has been fuelled by the recent observation of a low-temperature transition that suggests an onset of superconductivity in high-quality crystals of the itinerant-ferromagnet ZrZn2 (ref. 2), although the thermodynamic signature of this transition could not be detected. Here we show that the ferromagnet URhGe is superconducting at ambient pressure. In this case, we find the thermodynamic signature of the transition-its form is consistent with a superconducting pairing of a spin-triplet type, although further testing with cleaner samples is needed to confirm this. The combination of superconductivity and ferromagnetism may thus be more common and consequently more important than hitherto realized.
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UTe2 strongly differs from the superconductors described by the spin-fluctuation model; these materials exhibit both long range magnetic order and low-field superconductivity which precede a field-reentrant superconducting phase.
“However, UTe2 strongly differs from the superconductors described by the spin-fluctuation model; these materials exhibit both long range magnetic order and low-field superconductivity which precede a field-reentrant superconducting phase50,51”
From Orphan high field superconductivity in non-superconducting uranium ditelluride (2024) · cites this paper as [51]
The spin-fluctuation model for SCFP is similar to field-reinforced superconductivity observed in ferromagnetic superconductors UCoGe and URhGe.
“Another proposed explanation is that SCFP is stabilized by ferromagnetic fluctuations2, similar to field-reinforced superconductivity observed in ferromagnetic superconductors UCoGe50 and URhGe51 (Fig. 4).”
From Orphan high field superconductivity in non-superconducting uranium ditelluride (2024) · cites this paper as [51]
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Comparison of two superconducting phases induced by a magnetic field in UTe2
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- Authors
- Aoki, D., Huxley, A., Ressouche, E., Braithwaite, D., Flouquet, J., Brison, J.-P., Lhotel, E., & Paulsen, C.
- Affiliations
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Centre National de la Recherche Scientifique (FR)
- Corresponding author
- Huxley, Andrew
- Venue
- Nature
- Published
- 2001-10
- Volume
- 413
- Issue
- 6856
- Pages
- 613-616
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W2037707262
- Cited by
- 1,018
- References
- 0
- Citations by year
- 2026: 23 · 2025: 31 · 2024: 32 · 2023: 35 · 2022: 40 · 2021: 55 · 2020: 40 · 2019: 55 · 2018: 36 · 2017: 36 · 2016: 47 · 2015: 52 · 2014: 39 · 2013: 30 · 2012: 46
- FWCI
- 27.06
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Nature (publishedVersion)
- PubMed (publishedVersion)
- RePEc: Research Papers in Economics (submittedVersion)
- Funders
- National Science Foundation
- University of Chicago
- Materials Research Science and Engineering Center, Harvard University
- Topics
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Rare-earth and actinide compounds
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Physics of Superconductivity and Magnetism
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Advanced Condensed Matter Physics
- Keywords
- URhGe, superconductivity, ferromagnetism, superconductivity-ferromagnetism coexistence, spin-triplet pairing, itinerant ferromagnetism, UGe2, ZrZn2, superconducting transition, pairing symmetry
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