Content of research
Our mission is to create advanced materials based on the understanding of peculiar electronic properties (such as intrinsic spin Hall effect, topologicallynontrivial insulating state, or topological superconductivity) of novel inorganic materials. To achieve this goal, we combine growths of high-quality single crystals with state-of-the-art measurements of basic physical properties down to ultra-low temperatures.
Current Research Programs
- 1. Materials developments and basic research of topological insulators and superconductors
- 2. Elucidation of the physics of Majorana fermions that appear on the surface of topological superconductors
- 3. Basic research of spin Hall effect to create new principles for spintronics
- 4. Creation and understanding of novel superconductors
Figure / Graph
We discovered highly bulk-insulatingtopological insulators Bi2Te2Se and Bi2-xSbxTe3-ySey. In those materials, onecan observe pronounced quantumoscillations in magneto-transportproperties which reveal metallicsurface states inherent to topologicalinsulators. Electrons on the surface ofa topological insulator are helicallyspin-polarized, which makes it possibleto induce controllable spin polarizationwhose direction depends on that of thecurrent.