印刷ポリマーが室温でのキラリティとスピン相互作用の研究を可能にする(Printed Polymer Allows Researchers to Explore Chirality and Spin Interactions at Room Temperature)

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2024-03-15 ノースカロライナ州立大学(NCState)

新しい印刷可能な有機高分子が、スピントロニクス材料内のスピンから電荷への変換で生じる電荷量を室温で信頼性を持って測定することを可能にしました。この有機高分子は、調整可能な性質と多様性を持ち、低コストで環境にやさしい印刷可能な電子アプリケーションに望まれるだけでなく、キラリティやスピン相互作用の理解にも役立ちます。

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π共役系高分子のキラル集合体における逆キラリティ誘起スピン選択効果 Inverse chirality-induced spin selectivity effect in chiral assemblies of π-conjugated polymers

Rui Sun,Kyung Sun Park,Andrew H. Comstock,Aeron McConnell,Yen-Chi Chen,Peng Zhang,David Beratan,Wei You,Axel Hoffmann,Zhi-Gang Yu,Ying Diao & Dali Sun
Nature Materials  Published:15 March 2024
DOI:https://doi.org/10.1038/s41563-024-01838-8

extended data figure 1

Abstract

Coupling of spin and charge currents to structural chirality in non-magnetic materials, known as chirality-induced spin selectivity, is promising for application in spintronic devices at room temperature. Although the chirality-induced spin selectivity effect has been identified in various chiral materials, its Onsager reciprocal process, the inverse chirality-induced spin selectivity effect, remains unexplored. Here we report the observation of the inverse chirality-induced spin selectivity effect in chiral assemblies of π-conjugated polymers. Using spin-pumping techniques, the inverse chirality-induced spin selectivity effect enables quantification of the magnitude of the longitudinal spin-to-charge conversion driven by chirality-induced spin selectivity in different chiral polymers. By widely tuning conductivities and supramolecular chiral structures via a printing method, we found a very long spin relaxation time of up to several nanoseconds parallel to the chiral axis. Our demonstration of the inverse chirality-induced spin selectivity effect suggests possibilities for elucidating the puzzling interplay between spin and chirality, and opens a route for spintronic applications using printable chiral assemblies.

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1700応用理学一般
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