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セガワ コウジ
SEGAWA KOJI
瀬川 耕司 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2016/09 |
| 形態種別 | 研究論文 |
| 標題 | Spin-rotation symmetry breaking in the superconducting state of CuxBi2Se3 |
| 執筆形態 | その他 |
| 掲載誌名 | NATURE PHYSICS |
| 出版社・発行元 | NATURE PUBLISHING GROUP |
| 巻・号・頁 | 12(9),pp.852-854 |
| 著者・共著者 | K. Matano,M. Kriener,K. Segawa,Y. Ando,Guo-qing Zheng |
| 概要 | Spontaneous symmetry breaking is an important concept for understanding physics ranging from the elementary particles to states of matter. For example, the superconducting state breaks global gauge symmetry, and unconventional superconductors can break further symmetries. In particular, spin-rotational symmetry is expected to be broken in spin triplet superconductors. However, experimental evidence for such symmetry breaking has not been conclusively obtained so far in any candidate compounds. Here, using Se-77 nuclear magnetic resonance measurements, we show that spin-rotation symmetry is spontaneously broken in the hexagonal plane of the electron-doped topological insulator Cu0.3Bi2Se3 below the superconducting transition temperature T-c = 3.4 K. Our results not only establish spin-triplet superconductivity in this compound, but may also serve to lay a foundation for the research of topological superconductivity. |
| DOI | 10.1038/NPHYS3781 |
| ISSN | 1745-2473/1745-2481 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84973154642&origin=inward |