Material and Physical Properties in Spin-frustrated Systems
　

In this 3-year proposal, we will base on the research results from past years, then broaden the searching scope of materials and deepen the physical insight. The major efforts will focus on the following three topics.

1. To continue searching for more multiferroic materials from spin-frustrated systems, in particular from Spinel- and Kagome-structure materials. Furthermore, from discovering more different multiferroics, it would provide various mechanisms for controlling multiferroic properties. Then it might be helpful for spintronic application using these new materials.

2. To try preparing the skyrmion Cu2OSeO3 thin film. Because Cu2OSeO3 is an insulator, measuring and analyzing its magnetic,

optical and dielectric properties would be much useful to pursue potential application for the spintronics. To look for new skyrmions is also much attracted in the next few years.

3. To grow the Sb2Se3-xTex (x = 0、1、2、3) single crystals. Sb2Se3 is acommon insulator, while Sb2Te3 is a topological insulator. Thus, the systematic study will be useful to understand its occurrence of topological insulating properties. Furthermore, if we could grow Cu0.3Sb2Se3-xTex (x = 0、1、2、3) single crystals, it will allow us to study the occuring mechanism of topological superconductivity and compare to that of conventional, Cu-based and Fe-based superconductivity. Surly, to study new grown topological insulters

will be much engaged.