2025-10-30 東京大学,産業技術総合研究所,名古屋大学,大阪公立大学,分子科学研究所
キラル分子が磁石に吸着する新原理
＜関連情報＞
- https://www.issp.u-tokyo.ac.jp/maincontents/news2.html?pid=28530
- https://www.issp.u-tokyo.ac.jp/news/wp-content/uploads/2025/10/1030_press_chiral-spin.pdf
- https://www.science.org/doi/10.1126/sciadv.adv5220
分子振動によって駆動されるスピン分極はキラル分子のエナンチオ選択性につながる Spin polarization driven by molecular vibrations leads to enantioselectivity in chiral molecules
Shinji Miwa, Tatsuya Yamamoto, Takashi Nagata, Shoya Sakamoto, […] , and Tatsuhiko Ohto
Science Advances Published:29 Oct 2025
DOI:https://doi.org/10.1126/sciadv.adv5220
Abstract
Chirality-induced spin selectivity (CISS) encompasses phenomena such as magnetoresistance and enantiomer separation using ferromagnets. It has recently received notable attention. Despite this growing interest, the microscopic mechanisms driving CISS remain a subject of intense debate. This paper complements and extends the prevailing interpretation that attributes CISS primarily to the electric current in chiral molecules. We propose that molecular vibrations drive spin polarization in chiral molecules and play a critical role in CISS. Our results suggest that magnetic interactions between chiral molecules and ferromagnets, analogous to interlayer exchange coupling, provide a physically consistent mechanism for the observed selectivity. Specifically, we demonstrate that molecular vibrations facilitate the alignment of spin angular momentum dependent on chirality in the presence of an external magnetic field, which is a prerequisite for exchange coupling. These findings necessitate reevaluating spin dynamics, expanding its relevance beyond traditional solid-state physics to fields such as chemical reactions, molecular biology, and drug discovery.
