Superconducting spin reorientation in spin-triplet multiple superconducting phases of UTe₂
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- Kinjo, Katsuki
- Department of Physics, Graduate School of Science, Kyoto University; Present address: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
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- Fujibayashi, Hiroki
- Department of Physics, Graduate School of Science, Kyoto University
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- Matsumura, Hiroki
- Department of Physics, Graduate School of Science, Kyoto University
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- Hori, Fumiya
- Department of Physics, Graduate School of Science, Kyoto University
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- Kitagawa, Shunsaku
- Department of Physics, Graduate School of Science, Kyoto University
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- Ishida, Kenji
- Department of Physics, Graduate School of Science, Kyoto University
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- Tokunaga, Yo
- Advanced Science Research Center, Japan Atomic Energy Agency
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- Sakai, Hironori
- Advanced Science Research Center, Japan Atomic Energy Agency
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- Kambe, Shinsaku
- Advanced Science Research Center, Japan Atomic Energy Agency
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- Nakamura, Ai
- Institute for Materials Research, Tohoku University
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- Shimizu, Yusei
- Institute for Materials Research, Tohoku University
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- Homma, Yoshiya
- Institute for Materials Research, Tohoku University
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- Li, Dexin
- Institute for Materials Research, Tohoku University
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- Honda, Fuminori
- Institute for Materials Research, Tohoku University; Central Institute of Radioisotope Science and Safety, Kyushu University
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- Aoki, Dai
- Institute for Materials Research, Tohoku University; University Grenoble Alpes
Abstract
Superconducting (SC) state has spin and orbital degrees of freedom, and spin-triplet superconductivity shows multiple SC phases because of the presence of these degrees of freedom. However, the observation of spin-direction rotation occurring inside the SC state (SC spin rotation) has hardly been reported. Uranium ditelluride, a recently found topological superconductor, exhibits various SC phases under pressure: SC state at ambient pressure (SC1), high-temperature SC state above 0.5 gigapascal (SC2), and low-temperature SC state above 0.5 gigapascal (SC3). We performed nuclear magnetic resonance (NMR) and ac susceptibility measurements on a single-crystal uranium ditelluride. The b axis spin susceptibility remains unchanged in SC2, unlike in SC1, and decreases below the SC2-SC3 transition with spin modulation. These unique properties in SC3 arise from the coexistence of two SC order parameters. Our NMR results confirm spin-triplet superconductivity with SC spin parallel to b axis in SC2 and unveil the remaining of spin degrees of freedom in SC uranium ditelluride.
Journal
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- Science Advances
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Science Advances 9 (30), 2023-07
American Association for the Advancement of Science (AAAS)
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Details 詳細情報について
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- CRID
- 1050297039851504640
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- ISSN
- 23752548
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- HANDLE
- 2433/284529
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- Text Lang
- en
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- Article Type
- journal article
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- Data Source
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- IRDB