发表机构
Tsinghua University; The Chinese University of Hong Kong, Shenzhen(清华大学; 香港中文大学(深圳))
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
研究针对手性诱导自旋选择性(CISS)争议,利用供体-双链DNA-受体模型及林德布拉德方程,通过自旋分辨均方位移定义自旋迁移率极化,给出耗散驱动机制,揭示弱SOC下“一增强,一抑制”模式及螺旋翻转的影响。
AI 中文摘要
尽管进行了大量实验,手性诱导自旋选择性(CISS)仍存在争议。我们使用供体-双链DNA-受体模型和林德布拉德方程,通过自旋分辨均方位移定义自旋迁移率极化,并将弛豫固定在翻转平台上。自旋无关弛豫将螺旋自旋轨道耦合(SOC)的瞬态不对称锁定为稳定极化。弱SOC本应影响不大,却以“一增强,一抑制”模式增强一个自旋而抑制另一个。翻转螺旋会交换它们。这项工作将迁移率极化定义为一种探针,并给出了一种通用的耗散驱动的CISS机制。
英文摘要
The chiral-induced spin selectivity (CISS) effect poses a longstanding puzzle: how weak spin-orbit coupling (SOC) within a helical molecule produces strong spin polarization. We uncover a counterintuitive phenomenon, a "one-enhanced, one-suppressed" bifurcation of spin-resolved mobility relative to the SOC-free case. We trace this phenomenon to an analytical sign reversal of spin-dependent transmission and identify it as the microscopic origin of CISS. The phenomenon is found absent in achiral systems and single-stranded DNA, validating our theoretical picture. Our findings resolve the core puzzle and establish the origin of CISS.