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

Abstract

Symphonic use of multiple probes for materials science is discussed through two recent studies on high-Tc superconductors, 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.