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タイトル: | Two distinct superconducting pairing states divided by the nematic end point in FeSe1−xSx |
著者: | Hanaguri, Tetsuo Iwaya, Katsuya Kohsaka, Yuhki Machida, Tadashi Watashige, Tatsuya Kasahara, Shigeru https://orcid.org/0000-0002-6007-9617 (unconfirmed) Shibauchi, Takasada Matsuda, Yuji |
著者名の別形: | 花栗, 哲郎 岩谷, 克也 幸坂, 祐生 町田, 理 綿重, 達哉 笠原, 成 芝内, 孝禎 松田, 祐司 |
発行日: | 2-May-2018 |
出版者: | American Association for the Advancement of Science (AAAS) |
誌名: | Science Advances |
巻: | 4 |
号: | 5 |
論文番号: | eaar6419 |
抄録: | Unconventional superconductivity often competes or coexists with other electronic orders. In iron-based superconductors, a central issue has been the relationship between superconductivity and electronic nematicity, spontaneous breaking of the lattice rotational symmetry. Using spectroscopic-imaging scanning tunneling microscopy, we simultaneously investigated the electronic structure and the superconducting gap in FeSe1−xSx, where the nematicity diminishes above the nematic end point (NEP) at x = 0.17. The nematic band structure appears as anisotropic quasiparticle-interference patterns that gradually become isotropic with increasing x without anomalies at the NEP. By contrast, the superconducting gap, which is intact in the nematic phase, discontinuously shrinks above the NEP. This implies that the presence or absence of nematicity results in two distinct pairing states, whereas the pairing interaction is insensitive to the strength of nematicity. |
記述: | 「電子液晶」が超伝導に与える影響を直接観測 --高温超伝導を理解する手がかり--. 京都大学プレスリリース. 2018-05-29. |
著作権等: | © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
URI: | http://hdl.handle.net/2433/231254 |
DOI(出版社版): | 10.1126/sciadv.aar6419 |
PubMed ID: | 29806028 |
関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2018-05-29-3 |
出現コレクション: | 学術雑誌掲載論文等 |
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