3 0 0 0 OA 放射線からの直接エネルギー変換—放射性廃棄物の資源化の試み—
2 0 0 0 OA 鉄系超伝導体の電子ネマティック転移と斜方歪み
- 著者
- 芝内 孝禎 笠原 成 松田 祐司 福田 竜生 杉本 邦久
- 出版者
- 日本結晶学会
- 雑誌
- 日本結晶学会誌 (ISSN:03694585)
- 巻号頁・発行日
- vol.55, no.2, pp.128-134, 2013-04-30 (Released:2013-05-01)
- 参考文献数
- 59
Strongly interacting electrons can exhibit novel collective phases, among which the electronic nematic phases are perhaps the most surprising as they spontaneously break rotational symmetry of the underlying crystal lattice. Our highly sensitive magnetic torque measurements under in-plane field rotation in iron-based superconductors BaFe2(As1-xPx)2 provide evidence for the electronic nematic ordering below a characteristic temperature T*. High-resolution crystal-structure analysis by using synchrotron X-ray reveals small but finite orhthorhobic distortionbelow T* and the orthorhombicity shows a big jump at a lower temperature Ts. The results imply an electronic origin of rotational symmetry breaking, whose relation to superconductivityis discussed.