Enhancement and Discontinuity of Effective Mass through the First-Order Metamagnetic Transition in UTe2
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Metamagnetic transitions in the novel spin-triplet superconductor UTe$_2$ were investigated through the newly developed simultaneous measurements of magnetization and sample temperature for the field along the orthorhombic $b$-axis and close to the [011] direction, where reentrant superconductivity (RSC) is detected below and above the first-order metamagnetic transition field $H_{\rm m}$. Combining the Maxwell's relation and the Clausius-Clapeyron equation, we obtained the field dependence of Sommerfeld coefficient $γ$ through the first-order metamagnetic transition. A significant enhancement of the effective mass toward $H_{\rm m}$ were detected for both field directions. On the other hand, above $H_{\rm m}$, the effective mass discontinuously decreases for $H~||~b$, while it discontinuously increases for $H~||~\sim [011]$, which seems to make a crucial role for the RSC.
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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 [37]
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References 59 · Cited by 28
- 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)
- Kyushu University (JP)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- ORCID
- Venue
- Journal of the Physical Society of Japan
- Publisher
- Physical Society of Japan
- Published
- 2021-10-15
- Volume
- 90
- Issue
- 10
- Pages
- 103702
- ISSN
- 0031-9015 (ISSN-L)
- 1347-4073
- OpenAlex
- W3195130129
- Cited by
- 28
- References
- 59
- Citations by year
- 2026: 2 · 2025: 4 · 2024: 10 · 2023: 6 · 2022: 5 · 2021: 1
- FWCI
- 2.31
- 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 (JP15H05884, JP15H05882, JP15K21732, JP16H04006, JP15H05745, JP19H00646, JP20K03854, JP20K20889, JP20H00130, JP20KK0061)
- Precise Measurement Technology Promotion Foundation (PMTP-F)
- 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, effective mass, heavy fermion, uranium intermetallic compounds, magnetic phase transitions
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