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Chemistry of open-shell carbon-based pi-electron molecular materials and development into spin liquids

开壳层碳基π电子分子材料的化学及其自旋液体的发展

基本信息

批准号：
21H01907
负责人：
プラシデスコスマス
金额：
$ 11.07万
依托单位：
Osaka Metropolitan University (2022-2023)Osaka Prefecture University (2021)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2021
资助国家：
日本
起止时间：
2021-04-01 至 2024-03-31
项目状态：
已结题

项目摘要

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.

该项目的目标是合成新的晶体材料系列，其构建块是不同尺寸、形状和电子结构的电子活性π电子不饱和有机分子阴离子。我们一直在采用近年来开创的新化学方法来控制π电子开壳结构单元在空间中的定位，并创建几何受挫磁性晶格，该晶格可以作为纯粹由碳π电子产生的量子自旋液体的宿主。这些强相关的莫特绝缘相经过化学和物理的进一步处理，将它们变成金属和超导体。化学合成与高级理论相结合，并与一系列最先进的结构和磁性测量技术相结合，以识别出现的新电子态。迄今为止，已经取得了两项关键研究成果：（i）证明了脆弱磁态对化学掺杂剂引起的小扰动的敏感性，从而导致向长程有序磁态的转变；（ii）结合C60等球形单元来提供混合系统，有望成为新金属态和超导态的候选者。