AI 中文总结
该研究提出一种通用机制，通过向自旋轨道耦合体系引入赝自旋自由度调控Rashba线的非共线自旋，实现最高10%的量子相干自旋选择性，为自旋选择性输运器件提供设计准则。
AI 中文摘要
我们报告了一种此前被忽视的通用机制，可在不引入相位退相干的情况下，于常规时间反演对称的一维体系中获得高效自旋选择性。研究表明，费米能级处具有非共线自旋态的Rashba量子线，本征具备自旋选择性输运特性；通过向自旋轨道耦合体系引入额外的赝自旋自由度（如谷、子晶格或轨道角动量），可系统设计与调控这种自旋非共线性。将该框架应用于多子带半导体量子线与氧化物纳米线，我们建立了实现最高达10%的量子相干自旋选择性的通用路径，为自旋选择性输运器件提供了实用设计准则。
英文摘要
We report a previously overlooked general mechanism to obtain highly efficient spin selectivity in conventional time-reversal symmetric one-dimensional systems without invoking phase decoherence. We reveal that Rashba quantum wires featuring non-collinear spin states at the Fermi level inherently possess spin-selective transport properties. We show that this spin noncollinearity can be systematically designed and engineered by introducing an additional pseudospin degree of freedom - such as valley, sublattice, or orbital angular momentum - into spin-orbit coupled systems. By applying this framework to multi-subband semiconducting quantum wires and oxide nanowires, we establish a generalized route toward quantum-coherent spin selectivity up to 10 %. Our findings offer practical design principles for spin-selective transport devices.
Comments13 pages (with supplemental material), 5 figures
