Nano Frontier Superconducting Materials Group
Since superconductors can transport energy without loss, it is expected that superconductivity is a key solution technology to energy problems. We are focusing on the physical properties of Fe-based superconductors, diamond superconductors, high-Tc superconductors and carbon nanotubes. We have developed a superconducting wire using newly discovered superconducting materials. Development of novel devices, including optical and field effect devices, using superconductors and nano-technologies are targets.
Specialized Research Field
1. Iron-based superconductor and novel superconductor
Fig 1. Crystal structure of FeTe new superconductor.
Fig.2. Resistivity properties of Fe(Te,S) superconductor.
2. Superconducting diamond thin film
Fig. 3. SEM image of superconducting diamond film.
3. Development of pressure measurement device using diamond electrode
Fig. 4. Schematic picture of newly developed pressure device with diamond electrodes and result of the pressure loading above 100 GPa.
Very interesting physical phenomena such as room temperature superconductivity of hydrogen are predicted under super high pressure. On the other hand, in order to measure physical properties under such an extreme environment, there are various difficulties such as the problem of strength of the electrode. Therefore, we processed boron-doped diamond, the world's hardest electrode, into electrodes by microfabrication technology and developed the world's first diamond electrode introduction type pressure device.
(2) Success of super high pressure loading experiments exceeding 100 GPa
As a result of pressure discovery experiment using pressure device with newly developed diamond electrodes, we succeeded in generating super high pressure above 100 GPa. It is expected to be applied to the observation of various physical phenomena occurring in multi megabar regions.
