The conversion of charge current into spin current by the Rashba–Edelstein effect enables the reciprocal control of electron charge and magnetization in magnetoelectric and magneto-optical devices. The fundamentals of this effect are described in 3D lead-halide perovskites: due to spin-momentum locking, a strong charge-spin conversion, widely tunable by the injected charge density, is envisaged. The analysis highlights the close relationship between charge-spin conversion and the topological transition occurring from the low-density, torus-shaped Fermi surface (genus 1) to the high-density, simply connected Fermi surfaces (genus 0). At room temperature, spin-polarizations as large as ≈10% are obtained for input charge currents in the ≈10² to 10⁶ Acm⁻² range; at low temperature, almost full spin-polarization can be achieved, owed to the large, impurity scattering-limited mobilities. The results qualify lead-halide perovskites as suitable materials for spin-orbitronic applications.

中文翻译：

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卤化铅钙钛矿中的费米表面拓扑和 Rashba-Edelstein 电荷自旋转换

通过 Rashba-Edelstein 效应将充电电流转换为自旋电流，使得磁电和磁光器件中的电子电荷和磁化强度能够相互控制。这种效应的基本原理在 3D 卤化铅钙钛矿中进行了描述：由于自旋动量锁定，可以预见，可以通过注入的电荷密度进行广泛可调的强电荷自旋转换。该分析强调了电荷-自旋转换与从低密度、环形费米面（1 类）到高密度、简单连接的费米面（0 类）发生的拓扑转变之间的密切关系。^{在室温下，对于约 10 2}至 10 ⁶ Acm ^-2范围内的输入充电电流，获得了约 10% 的自旋极化范围; 在低温下，由于杂质散射限制的大迁移率，可以实现几乎完全的自旋极化。结果表明卤化铅钙钛矿适合作为自旋轨道电子学应用的材料。