2024-05-03 ノースカロライナ州立大学(NCState)
＜関連情報＞
- https://news.ncsu.edu/2024/05/when-injecting-pure-spin-into-chiral-materials-direction-matters/
- https://www.science.org/doi/10.1126/sciadv.adn3240
キラリティが誘起するスピン流の巨大な異方性吸収 Colossal anisotropic absorption of spin currents induced by chirality
RUI SUN, ZIQI WANG, BRIAN P. BLOOM, ANDREW H. COMSTOCK, […], AND DALI SUN
Science Advances Published:3 May 2024
DOI:https://doi.org/10.1126/sciadv.adn3240
Abstract
The chiral induced spin selectivity (CISS) effect, in which the structural chirality of a material determines the preference for the transmission of electrons with one spin orientation over that of the other, is emerging as a design principle for creating next-generation spintronic devices. CISS implies that the spin preference of chiral structures persists upon injection of pure spin currents and can act as a spin analyzer without the need for a ferromagnet. Here, we report an anomalous spin current absorption in chiral metal oxides that manifests a colossal anisotropic nonlocal Gilbert damping with a maximum-to-minimum ratio of up to 1000%. A twofold symmetry of the damping is shown to result from differential spin transmission and backscattering that arise from chirality-induced spin splitting along the chiral axis. These studies reveal the rich interplay of chirality and spin dynamics and identify how chiral materials can be implemented to direct the transport of spin current.
