| 研究実績の概要 |
The project targets the synthesis of new crystalline materials families whose building blocks are electronically-active π-electron unsaturated organic molecular anions of varying size, shape, and electronic structure. We have been employing the new chemistry we pioneered in recent years to control the positioning of the pi-electron open-shell building blocks in space and create geometrically-frustrated magnetic lattices, which can act as hosts of quantum spin liquids purely arising from carbon pi-electrons. These strongly-correlated Mott insulating phases are further manipulated chemically and physically to turn them into metals and superconductors. Chemical synthesis is combining with high-level theory and integrated with a range of state-of-the-art structural and magnetic measurement techniques to identify the new electronic states that arise. To-date, two key research achievements have been reached: (i) the demonstration of the sensitivity of the fragile magnetic states to small perturbations induced by the chemical dopants that lead to transitions to long-range-ordered magnetic states, and (ii) the incorporation of spherical units like C60 to afford hybrid systems, promising candidates of new metallic and superconducting states.
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| 今後の研究の推進方策 |
The behavior of the binary phases of reduced polyaromatic hydrocarbons doped with alkali metals will be investigated by a variety of experimental techniques probing accurately both the changes in crystalline structure and the resulting changes in the magnetic properties. Experimental techniques to be used will be synchrotron X-ray and powder neutron diffraction combined with complementary magnetization, EPR, NMR and muSR measurements. The separate thread of hybrid molecular solids will be extended to include the isolation of reduced phases where the number of injected electrons is accurately controlled. The characterization of the line phases resulting as a result of this chemistry will be attempted at first stage by synchrotron X-ray diffraction and by SQUID magnetometry.
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