Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
Open accessAbstract
Single crystal specimens of the actinide compound uranium ditelluride, UTe2, are of great importance to the study and characterization of its dramatic unconventional superconductivity, believed to entail spin-triplet electron pairing. A variety in the superconducting properties of UTe2 reported in the literature indicates that discrepancies between synthesis methods yield crystals with different superconducting properties, including the absence of superconductivity entirely. This protocol describes a process to synthesize crystals that exhibit superconductivity via chemical vapor transport, which has consistently exhibited a superconducting critical temperature of 1.6 K and a double transition indicative of a multi-component order parameter. This is compared to a second protocol that is used to synthesize crystals via the molten metal flux growth technique, which produces samples that are not bulk superconductors. Differences in the crystal properties are revealed through a comparison of structural, chemical, and electronic property measurements, showing that the most dramatic disparity occurs in the low-temperature electrical resistance of the samples.
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UTe2 crystals with no SC1 transition usually have RRR ≲ 5, which implies a high degree of disorder.
“UTe2 crystals with no SC1 transition usually have a RRR ≲ 5, which implies a high degree of disorder33,34.”
From Orphan high field superconductivity in non-superconducting uranium ditelluride (2024) · cites this paper as [33]
The Representative Results report that a flux-grown UTe2 sample did not superconduct, had an RRR of approximately 2, and had more crystallographic impurities or defects than the superconducting sample. The paper does not establish that crystals lacking the SC1 transition usually have RRR ≲ 5; its reported value concerns the flux-grown sample, not a general threshold. (LLM, conf=0.86)
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Knebel, G., Knafo, W., Pourret, A., Niu, Q., Vališka, M., Braithwaite, D., Lapertot, G., Nardone, M., Zitouni, A., Mishra, S., et al. (2019) · Journal of the Physical Society of Japan · doi:10.7566/jpsj.88.063707 · Cited by 168 · see citing works
Miao, L., Liu, S., Xu, Y., Kotta, E. C., Kang, C.-J., Ran, S., Paglione, J., Kotliar, G., Butch, N. P., Denlinger, J. D., et al. (2020) · Physical Review Letters · doi:10.1103/physrevlett.124.076401 · Cited by 105 · see citing works
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Unconventional superconductivity in UTe<sub>2</sub>
Aoki, D., Brison, J.-P., Flouquet, J., Ishida, K., Knebel, G., Tokunaga, Y., & Yanase, Y. (2022) · Journal of Physics: Condensed Matter · doi:10.1088/1361-648x/ac5863 · Cited by 193 · see citing works
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Orphan high field superconductivity in non-superconducting uranium ditelluride
Frank, C. E., Lewin, S. K., Saucedo Salas, G., Czajka, P., Hayes, I. M., Yoon, H., Metz, T., Paglione, J., Singleton, J., & Butch, N. P. (2024) · Nature Communications · doi:10.1038/s41467-024-47090-1 · Cited by 16 · see citing works
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- Authors
- Ran, S., Liu, I.-L., Saha, S. R., Saraf, P., Paglione, J., & Butch, N. P.
- Affiliations
- National Institute of Standards and Technology (US)
- Maryland Quantum Materials Center (US)
- Venue
- Journal of Visualized Experiments
- Publisher
- MyJove Corporation
- Published
- 2021-07-08
- Issue
- 173
- ISSN
- 1940-087X (ISSN-L)
- PMC
- PMC10505351
- OpenAlex
- W3177664958
- Cited by
- 13
- References
- 2
- Citations by year
- 2025: 3 · 2024: 4 · 2022: 6
- FWCI
- 1.05
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Licence
- cc-by-nc-nd
- Locations
- Journal of Visualized Experiments (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion, cc-by-nc-nd)
- Funders
- U.S. Department of Energy (DESC0019154)
- Gordon and Betty Moore Foundation (GBMF9071)
- National Institute of Standards and Technology
- 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 › Chemistry › Inorganic Chemistry › Radioactive element chemistry and processing
- Keywords
- UTe2, single crystal growth, chemical vapor transport, unconventional superconductivity, spin-triplet pairing, superconducting critical temperature, low-temperature resistivity
- MeSH terms
- Superconductivity, Electrons, Temperature, Uranium
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