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DOI | 10.1126/science.abb0272 |
Multicomponent superconducting order parameter in UTe2 | |
I. M. Hayes; D. S. Wei; T. Metz; J. Zhang; Y. S. Eo; S. Ran; S. R. Saha; J. Collini; N. P. Butch; D. F. Agterberg; A. Kapitulnik; J. Paglione | |
2021-08-13 | |
发表期刊 | Science
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出版年 | 2021 |
英文摘要 | Most superconductors have only one transition point and, below a certain temperature, their electrical resistance drops to zero. In very rare cases, another superconducting transition appears at a lower temperature. By measuring its specific heat, Hayes et al. reveal that this two-step superconductivity occurs in the compound uranium ditelluride. Complementary optical measurements indicated the breaking of time reversal symmetry, constraining the possible symmetries of the order parameter in this material. Science , abb0272, this issue p. [797][1] An unconventional superconducting state was recently discovered in uranium ditelluride (UTe2), in which spin-triplet superconductivity emerges from the paramagnetic normal state of a heavy-fermion material. The coexistence of magnetic fluctuations and superconductivity, together with the crystal structure of this material, suggests that a distinctive set of symmetries, magnetic properties, and topology underlie the superconducting state. Here, we report observations of a nonzero polar Kerr effect and of two transitions in the specific heat upon entering the superconducting state, which together suggest that the superconductivity in UTe2 is characterized by a two-component order parameter that breaks time-reversal symmetry. These data place constraints on the symmetries of the order parameter and inform the discussion on the presence of topological superconductivity in UTe2. [1]: /lookup/doi/10.1126/science.abb0272 |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/335886 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | I. M. Hayes,D. S. Wei,T. Metz,et al. Multicomponent superconducting order parameter in UTe2[J]. Science,2021. |
APA | I. M. Hayes.,D. S. Wei.,T. Metz.,J. Zhang.,Y. S. Eo.,...&J. Paglione.(2021).Multicomponent superconducting order parameter in UTe2.Science. |
MLA | I. M. Hayes,et al."Multicomponent superconducting order parameter in UTe2".Science (2021). |
条目包含的文件 | 条目无相关文件。 |
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