Study of magnetic correlations in the electron-doped cuprate superconductors by means of impurity-substitution effects

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K17689
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Tohoku University
• Principal Investigator: Suzuki Kensuke 東北大学, 金属材料研究所, 助教 (60734134)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 銅酸化物高温超伝導 / 強相関電子系 / 中性子散乱法 / ミュオンスピン回転法 / 磁気相関

Outline of Final Research Achievements

Despite numerous studies on high-Tc cuprate superconductors, the detailed relationship between magnetic correlations and the superconductivity has not been clarified yet. The present project aimed to reveal the detailed magnetic correlations in the electron-doped cuprate superconductors R2-xCexCuO4 (R = Pr, Nd, Eu). First, it has been revealed that a small amount of substitution of a magnetic impurity Fe3+ works well on enhancing the weak magnetic signals of the present samples. Then, an existence of dynamically fluctuating magnetic state is revealed to be realized in a wide temperature region above the magnetic ordered state in the R2-xCexCuO4 system. This result shed new light on the electron-hole asymmetry of the high-Tc superconductivity.

Free Research Field

高温超伝導体における磁性