Spin fluctuation of iron-based superconductors studied by neutron scattering

2014 Fiscal Year Final Research Report

• Project/Area Number: 24340090
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: CHUL-HO Lee 独立行政法人産業技術総合研究所, 省エネルギー研究部門, 研究グループ付 (80358358)
• Co-Investigator(Renkei-kenkyūsha): EISAKI Hiroshi 産業技術総合研究所, 電子光技術研究部門, 首席研究員 (20242018) ; IYO Akira 産業技術総合研究所, 電子光技術研究部門, 上級主任研究員 (50356523) ; KAZUMASA Horigane 岡山大学, 大学院自然科学研究科, 准教授 (10406829)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 鉄系超伝導体 / 中性子非弾性散乱 / スピン揺動 / レゾナンスモード

Outline of Final Research Achievements

We studied spin fluctuations of iron-based superconductors using neutron scattering technique. Especially, we have examined the magnetic signal, so called spin resonance, which is enhanced strongly in superconducting phase. As results, strong relationship between magnetsim and superconductivity has been demonstrated. The spin resonance disappears in a certain carrier concentration range, which suggests that other interactions rather than magnetism play an essential role in the appearance of superconductivity. Various interactions might cooperate for inducing the superconductivity in iron-based superconductors.

Free Research Field

固体物性