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arXiv 1104.2673cond-mat.mes-hall
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二维磁体中的手征波

Chirality waves in two-dimensional magnets

D. Solenov, D. Mozyrsky, I. Martin

摘要:

我们从理论上证明了在一个平面内运动的电子与局域化的磁矩之间的适度相互作用会导致非共面磁态的形成。这种状态类似于最近在具有Dzyaloshinskiii-Moriya相互作用的立方系统中观察到的skyrmion晶体;然而,它不需要自旋轨道相互作用。非共面磁性伴随着基态电流和自旋电流,通过实空间Berry相位机制产生。我们研究的稳定性的状态相对于晶格离散效应和磁交换相互作用的大小。该状态可以在许多过渡金属和磁性半导体系统中实现。

英文摘要:

We theoretically show that moderate interaction between electrons confined to move in a plane and localized magnetic moments leads to formation of a noncoplanar magnetic state. The state is similar to the skyrmion crystal recently observed in cubic systems with the Dzyaloshinskii-Moriya interaction; however, it does not require spin-orbit interaction. The non-coplanar magnetism is accompanied by the ground-state electrical and spin currents, generated via the real-space Berry phase mechanism. We examine the stability of the state with respect to lattice discreteness effects and the magnitude of magnetic exchange interaction. The state can be realized in a number of transition metal and magnetic semiconductor systems.

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