AI 中文总结
研究以双层反铁磁CrSBr为原型，提出矢量自旋手性可作为可调旋钮生成含CSC和CIC的非常规磁性BPVE，该效应具高可控性，为相关应用提供了基础。
AI 中文摘要
体光伏效应（BPVE）可在磁性材料中得到极大丰富。本文将矢量自旋手性确立为生成非常规时间反演偶极磁性BPVE的可调旋钮，该效应包含手性位移电流（CSC）和手性注入电流（CIC）。以双层反铁磁（AFM）CrSBr为原型，从理论上证明了CSC和CIC的存在。与非中心对称晶体结构或共线磁序产生的常规光伏电流相比，CSC和CIC不仅具有相当的大小，还展现出卓越的可调性：可通过磁场诱导的自旋倾斜实现开关，随倾斜方向反转而改变方向，且通过倾斜角变化可连续调制强度。此外，本文揭示了CrSBr中支配这两种电流的异常光学跃迁通道。本研究确立了具有显著可控性的非常规磁性BPVE，为非共线磁体中的光电子学和磁传感应用铺平了道路。
英文摘要
The bulk photovoltaic effect (BPVE) can be greatly enriched in magnetic materials. Here, we establish vector spin chirality as a tunable knob for generating an unconventional time-reversal-even magnetic BPVE, comprising the chiral shift current (CSC) and chiral injection current (CIC). Using bilayer antiferromagnetic (AFM) CrSBr as a prototype, we theoretically demonstrate the emergence of CSC and CIC. Compared with conventional photovoltaic currents arising from noncentrosymmetric crystal structures or collinear magnetic orderings, CSC and CIC not only possess comparable magnitudes but also exhibit exceptional tunability. Specifically, they can be switched on and off by magnetic-field-induced spin canting, reversed in direction upon canting-direction reversal, and continuously modulated in intensity via canting-angle variation. Furthermore, we reveal an unusual optical transition channel governing both currents in CrSBr. Our work establishes an unconventional magnetic BPVE with remarkable controllability, paving the way for applications in optoelectronics and magnetic sensing in noncollinear magnets.
Comments10 pages, 5 figures
