Title: Chiral electrons and spin selectivity at chiral-achiral interfaces Show Chinese title

Title: 手性电子和手性-非手性界面的自旋选择性

Abstract: Chiral molecules can selectively transport electrons of a particular spin orientation, yet the underlying mechanism remain poorly understood. Here, we present theoretical evidence that electrons propagating through chiral materials with screw symmetry exhibit chirality themselves and carry symmetry-induced pseudo-angular momentum (PAM) which must be characterized by both spin and orbital components. The chiral electron transport is PAM polarized, with counterpropagating states exhibiting opposite PAM. At chiral-achiral interfaces, the PAM polarization is converted to spin polarization due to wave function matching, thereby establishing a novel principle for the chiral-induced spin selectivity. Show Chinese abstract

Abstract: 手性分子可以选择性地传输特定自旋方向的电子，但其潜在机制仍不清楚。 在这里，我们提出了理论证据，表明通过具有螺旋对称性的手性材料传播的电子本身表现出手性，并携带由对称性引起的伪角动量（PAM），这种伪角动量必须通过自旋和轨道分量来表征。 手性电子输运具有PAM极化特性，反向传播的状态表现出相反的PAM。 在手性-非手性界面处，由于波函数匹配，PAM极化转化为自旋极化，从而建立了一种新的原理，用于手性诱导的自旋选择性。