25pXJ-2 Mesoscopic Hall effect driven by chiral spin order
25pXJ-2 Mesoscopic Hall effect driven by chiral spin order
复制标题
25pXJ-2手性自旋序驱动的介观霍尔效应
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
B. Kramer
中科院分区：
文献类型：
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作者：
J. Ohe;T. Ohtsuki;B. Kramer
研究了介观系统中由自旋手征引起的霍尔效应。我们考虑了一个四端霍尔系统，该系统包含具有涡旋畴壁几何形状的局域自旋，在涡旋中心附近出现强的自旋手征。假设传导电子的费米能与绝热近似不再有效的交换耦合能相当。我们的研究结果表明，霍尔效应的电压降和自旋电流出现在横向方向，这是生存在弱无序的存在。指出了这种霍尔效应与自旋轨道相互作用系统中常规自旋霍尔效应的相似性。
A Hall effect due to spin chirality in mesoscopic systems is investigated. We consider a four-terminal Hall system including local spins with geometry of a vortex domain wall, where strong spin chirality appears near the center of the vortex. The Fermi energy of the conduction electrons is assumed to be comparable to the exchange coupling energy where the adiabatic approximation ceases to be valid. Our results show a Hall effect where a voltage drop and a spin current arise in the transverse direction, which is shown to survive in the presence of weak disorder. The similarity between this Hall effect and the conventional spin Hall effect in systems with spin-orbit interaction is pointed out.