| 研究実績の概要 |
The project has developed 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 integrated with state-of-the-art structural and magnetic measurement techniques to identify the new electronic states that arise. To date, we have established the fragility of the magnetic states to small perturbations induced by the chemical dopants that lead to transitions to long-range-ordered magnetic states, which were studied by ultralow temperature resonance techniques (NMR and muSR). At the same time, we found that incorporation of high-symmetry fullerene units leads to the isolation of hybrid systems, promising candidates of new electronic states.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
1: 当初の計画以上に進展している
理由
The purpose of the project is to isolate new families of pi-electron carbon-based molecular materials and explore the emergence of new electronic properties. This is being successfully carried out to an advanced stage. In particular, reduced pi-electron families of polyaromatic hydrocarbons chemically synthesized in this work have allowed us to establish the influence of the nature of the dopant and the modified crystalline structures on the structural and electronic properties. In addition, we have successfully incorporated fullerenes into the polyaromatic hydrocarbon architectures. Structural and magnetic characterizations have been completed for proof-of-concept hybrid systems.
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