Symphonic use of quantum beams for materials science -now and future-

14th International Workshop on Slow Positron Beam Techniques & Applications

Yamada, K.^1 ; Hiraka, H.^2

Institute of Materials Structure Science, KEK, Oho1-1, Ibaraki, Tsukuba

305-0801, Japan^1

Graduate School of Science and Engineering, Ibaraki University, 2-1-1 Bunkyo, Ibaraki, Mito

310-8512, Japan^2

关键词: Antiferromagnetics;    Future prospects;    High Tc superconductors;    Hydrogen concentration;    Impurities in;    La2CuO4;    Synchrotron x rays;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/791/1/012001/pdf
DOI  :  10.1088/1742-6596/791/1/012001

来源: IOP

【 摘 要 】

Symphonic use of multiple probes for materials science is discussed through two recent studies on high-Tcsuperconductors, and a future prospect of the symphonic use is given. For a hydrogen-doped iron-based superconductor, which shows a double-peaked superconducting dome as a function of hydrogen concentration, symphonic use of neutron, muon and synchrotron x-ray probes discovered a second antiferromagnetic (AF) phase and its contrasting feature compared to the first AF phase. A drastic change of the AF order by Ni impurities in slightly hole-doped La2CuO4, a Mott insulator, has been studied by using neutron and synchrotron x-ray probes. The symphonic use of these probes clarified the microscopic dual electronic states for both Cu and Ni in this system.