Dissipationless spin current generation in a Kitaev chiral spin liquid
Dissipationless spin current generation in a Kitaev chiral spin liquid
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Kitaev 手性自旋液体中无耗散自旋电流的产生
DOI：
10.1103/physrevb.105.115137
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发表时间：
2022
影响因子：
3.7
通讯作者：
Fujimoto Satoshi
中科院分区：
文献类型：
--
作者：
Takikawa Daichi;Yamada Masahiko G.;Fujimoto Satoshi
是基塔耶夫自旋液态的一种有希望的候选材料，在基塔耶夫自旋液态中，热霍尔效应的半量子化表明了一种拓扑特征。在这里，我们提出了一个更直接的手性Majorana边缘模式的特征，它出现在Kitaev模型中边缘自旋Seebeck效应的德鲁德权的普遍标度中。此外，在手性边缘模式中没有反向散射导致产生无耗散自旋电流，尽管自旋相关长度非常短，接近体中的晶格常数。这一结果不仅在实验上可以观察到，而且为基塔耶夫材料的自旋电子学应用开辟了一条道路。
is a promising candidate material for the Kitaev spin liquid state where the half quantization of the thermal Hall effect, suggesting a topological character, has been observed. Here we propose a more direct signature of a chiral Majorana edge mode which emerges in a universal scaling of the Drude weight of the edge spin Seebeck effect in the Kitaev model. Moreover, the absence of backscatterings in the chiral edge mode results in the generation of a dissipationless spin current in spite of an extremely short spin correlation length close to a lattice constant in the bulk. This result is not only experimentally observable, but also opens a way towards spintronics application of Kitaev materials.