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Okayama Univ. Faculty of Science Dept. of Chemistry Research Laboratory for Surface Science RCNF

Introduction to Research
Research achievement
Lab. tour
Diary of Lab.
Research in Kubozono Lab.
1. Fabrication and characterization of new types of molecular superconductors
2. Fabrication and characterization of light element superconductors
3. Fabrication and characterization of FeSeTe related superconductors
4. Electrostatic carrier control in two-dimensional inorganic materials and topological insulators
5. Electronic devices (transistor and solar cell) based on organic molecules
6. Electrostatic carrier control in graphene and related materials
7. Nanoscale science in light element materials
1. Fabrication and characterization of new types of molecular superconductors

Our group is working on superconductivity based on organic hydrocarbon molecules. In 2010, we published paper on superconductivity of alkali-metal doped picene solids in Nature (Nature, 464, 76 (2010)). The picene solids doped with potassium showed Tcs as high as 7 and 18 K. 18 K superconductivity was the highest in organic molecule superconductors. Subsequently, some group reported superconductivity in organic molecular solids doped with alkali-metals. The crystal structure is still unclear up to now and we are focusing on determination of crystal structure. These molecular superconductors are very attractive because the superconductors are exactly new-type. At the present stage, our target is to make high-quality superconducting materials (100% shielding fraction!) and to increase Tc. Now we are using various chemical techniques for making high-quality molecular superconductors. From viewpoints of physics, the molecular superconductors are also attractive owing to some interesting behaviors which may not be explained within the framework of BCS theory.