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arXiv 1801.08375cond-mat.mtrl-sci
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磁Skyrmion上高分辨隧穿自旋输运理论

Theory of high-resolution tunneling spin transport on a magnetic skyrmion

Krisztián Palotás, Levente Rózsa, László Szunyogh

摘要:

从理论上描述了磁扫描隧道显微镜(STM)中磁性Skyrmion的隧穿自旋输运特性。在相同的理论框架下,以高空间分辨率计算了STM中的自旋极化电荷流(SP-STM)和隧道自旋输运矢量,即纵向自旋流和自旋转移矩.证明了传统电荷电流SP-STM图像对比度与自旋输运矢量幅度之间的联系,使得能够基于实验测量的SP-STM图像来估计隧道自旋输运性质。一个相当大的可调谐性的自旋输运矢量所涉及的自旋极化也突出显示。这些可能性和隧道电荷和矢量自旋输运的组合理论为深入了解SP-STM中电流诱导的隧道自旋输运性质和表面复杂磁性纹理的相关动力学铺平了道路。

英文摘要:

Tunneling spin transport characteristics of a magnetic skyrmion are described theoretically in magnetic scanning tunneling microscopy (STM). The spin-polarized charge current in STM (SP-STM) and tunneling spin transport vector quantities, the longitudinal spin current and the spin transfer torque, are calculated in high spatial resolution within the same theoretical framework. A connection between the conventional charge current SP-STM image contrasts and the magnitudes of the spin transport vectors is demonstrated that enables the estimation of tunneling spin transport properties based on experimentally measured SP-STM images. A considerable tunability of the spin transport vectors by the involved spin polarizations is also highlighted. These possibilities and the combined theory of tunneling charge and vector spin transport pave the way for gaining deep insight into electric-current-induced tunneling spin transport properties in SP-STM and to the related dynamics of complex magnetic textures at surfaces.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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