AI 中文总结
研究基于正常金属/手性分子/交替磁体结构建自旋阀，利用非平衡格林函数方法和朗道尔 - 布蒂克尔公式，揭示了自旋阀电导和磁阻特性，为开发高效、可控且无杂散场的自旋电子器件奠定基础。
AI 中文摘要
手性分子因其产生高度自旋极化电流的能力而引起了广泛的跨学科关注。这种被称为手性诱导自旋选择性效应的现象在自旋电子学领域具有巨大潜力。在此，我们提议将手性分子与交替磁体相结合，构建高效且可调谐的自旋阀。利用非平衡格林函数方法和朗道尔 - 布蒂克尔公式，我们获得了正常金属/手性分子/交替磁体自旋阀的电导和磁阻。我们的理论结果表明，通过重新定向交替磁体的奈尔矢量可以有效调节自旋阀的电导，并且自旋阀的磁阻随分子长度和交替磁各向异性增加。此外，对于非手性分子或在没有分子自旋 - 轨道耦合的情况下磁阻消失。我们的工作为开发高效、可控且无杂散场的自旋电子器件铺平了道路。
英文摘要
Chiral molecules have attracted broad interdisciplinary interest for their ability to produce highly spin-polarized current. This phenomenon, known as the chiral-induced spin selectivity effect, holds great potential in the field of spintronics. Here, we propose to combine chiral molecules with altermagnets to construct highly efficient and tunable spin valves. Using the nonequilibrium Green's function method and the Landauer-Büttiker formula, we obtain the conductance and the magnetoresistance of a normal metal/chiral molecule/altermagnet spin valve. Our theoretical results reveal that the conductance of the spin valve can be effectively tuned by reorienting the Néel vector of the altermagnet, and the magnetoresistance of the spin valve increases with molecular length and altermagnetic anisotropy. Moreover, the magnetoresistance vanishes for achiral molecules or in the absence of molecular spin-orbit coupling. Our work paves the way for developing efficient, controllable, and stray-field-free spintronic devices.
Comments11 pages, 8 figures
Journal refPhys. Rev. B 114, 065412 (2026)
