Robustness of topological Hall effect of nontrivial spin textures.

Robustness of topological Hall effect of nontrivial spin textures.
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DOI:
10.1038/srep05123
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发表时间:
2014-05-30
期刊:
影响因子:
4.6
通讯作者:
Tan SG
Tan SG
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Jalil MB;Tan SG

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我们分析了拓扑非平凡的自旋纹理,如磁涡旋和skyrmions的拓扑霍尔电导率(THC),并探讨其可能的应用在基于这些自旋纹理的磁存储器的回读。在绝热条件下,这种自旋纹理理论上会产生量子化的THC值,这些值与拓扑不变量(如缠绕数和极性)有关,因此对波动和平滑变形不敏感。然而,在实际设置中,自旋纹理元素的有限尺寸和边缘的影响可能导致它们偏离其理想配置。我们计算的THC输出在实际的磁存储器中的边缘和有限尺寸效应的存在下的鲁棒性的程度。
We analyze the topological Hall conductivity (THC) of topologically nontrivial spin textures like magnetic vortices and skyrmions and investigate its possible application in the readback for magnetic memory based on those spin textures. Under adiabatic conditions, such spin textures would theoretically yield quantized THC values, which are related to topological invariants such as the winding number and polarity, and as such are insensitive to fluctuations and smooth deformations. However, in a practical setting, the finite size of spin texture elements and the influence of edges may cause them to deviate from their ideal configurations. We calculate the degree of robustness of the THC output in practical magnetic memories in the presence of edge and finite size effects.
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