Metamagnetic Transition in Heavy Fermion Superconductor UTe2
Open accessAbstract
We have studied the magnetization of the recently discovered heavy fermion superconductor UTe$_2$ up to 56 T in pulsed-magnetic fields. A first-order metamagnetic transition has been clearly observed at $H_{\rm m}$ =34.9 T when the magnetic field $H$ is applied along the orthorhombic hard-magnetization $b$-axis. The transition has a critical end point at $\sim$11 K and 34.8 T, where the first order transition terminates and changes into a crossover regime. Using the thermodynamic Maxwell relation, we have evaluated the field dependence of the Sommerfeld coefficient of the specific heat directly related to the superconducting pairing. From the analysis, we found a significant enhancement of the effective mass centered at $H_{\rm m}$, which is reminiscent of the field-reentrant superconductivity of the ferromagnet URhGe in transverse fields. We discuss the origin of their field-robust superconductivity.
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The Hm value in Orphan UTe2 is slightly lower than previous observations of Hm from low-field-superconducting samples of UTe2 and lower than the metamagnetic transitions recorded for both Low-R and High-R UTe2.
“This value is slightly lower than previous observations of Hm reported from low-field-superconducting samples of UTe23,5,18,35–37, and lower than the metamagnetic transitions recorded for both Low-R and High-R UTe2 (Fig. 2b).”
From Orphan high field superconductivity in non-superconducting uranium ditelluride (2024) · cites this paper as [35]
The oSCFP phase in Orphan UTe2 has a narrower angular range than typical SCFP, which extends from 25° to 42° in crystals with higher RRR.
“The narrower angular range of the oSCFP is striking when compared to typical SCFP, which extends from 25o to 42o in crystals with higher RRR (Fig. 2b, see Fig. S4 in Supplementary Information for comparison with published data3,35,36,41).”
From Orphan high field superconductivity in non-superconducting uranium ditelluride (2024) · cites this paper as [35]
The cited paper discusses UTe₂ magnetization for fields along the a- and b-axes (pp. 1–2) and possible field-reinforced superconductivity (p. 4). Searches for the 25°–42° angular range and higher-RRR crystals found no passage in our copy addressing either, so it cannot verify the comparison with oSCFP. (LLM, conf=0.76)
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References 24 · Cited by 114
- Authors
- Miyake, A., Shimizu, Y., Sato, Y. J., Li, D., Nakamura, A., Homma, Y., Honda, F., Flouquet, J., Tokunaga, M., & Aoki, D.
- Affiliations
- The Institute for Solid State Physics, The University of Tokyo (JP)
- Institute for Materials Research, Tohoku University (JP)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Venue
- Journal of the Physical Society of Japan
- Publisher
- Physical Society of Japan
- Published
- 2019-06-15
- Volume
- 88
- Issue
- 6
- Pages
- 063706
- ISSN
- 0031-9015 (ISSN-L)
- 1347-4073
- OpenAlex
- W2944089906
- Cited by
- 114
- References
- 24
- Citations by year
- 2026: 6 · 2025: 13 · 2024: 19 · 2023: 15 · 2022: 16 · 2021: 14 · 2020: 18 · 2019: 13
- FWCI
- 8.90
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Journal of the Physical Society of Japan (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- HAL (submittedVersion)
- arXiv (Cornell University)
- Funders
- Japan Society for the Promotion of Science (15K05156, 15H05884, 15H05745, 19H00646, 17K14328, 15H05882, 15K21732, 19J20539, 15KK0149)
- 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
- UTe2, heavy fermion superconductivity, metamagnetic transition, uranium telluride, magnetic phase transitions, superconducting transition
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