Experimental realization of a non-magnetic one-way spin switch
Experimental realization of a non-magnetic one-way spin switch
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DOI：
10.1038/s41467-019-11210-z
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发表时间：
2019-02
影响因子：
16.6
通讯作者：
M. Mossman;Junpeng Hou;Xiwang Luo;Chuanwei Zhang;P. Engels
中科院分区：
文献类型：
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作者：
M. Mossman;Junpeng Hou;Xiwang Luo;Chuanwei Zhang;P. Engels
对于未来的电子设备来说，通过非磁性手段控制磁性是非常可取的，因为这种手段通常具有超低功率要求，并且可以提供一致的控制。近年来，在众多材料体系中的磁性电操纵领域取得了很大的实验进展。这些研究一般不考虑施加的非磁势和/或磁开关的方向性。在这里，我们从理论上构思并实验证明了一种非磁性的单向自旋开关装置，该装置使用自旋-轨道耦合的玻色-爱因斯坦凝聚体，受到运动的自旋无关排斥偶极势的作用。这种单向装置的物理基础是基于伽利略不变性在自旋-轨道耦合的存在下的崩溃。这种单向自旋开关为设计具有独特功能的量子器件开辟了一条途径，并可能促进对其他单向自旋和原子电子器件的进一步实验研究。
Controlling magnetism through non-magnetic means is highly desirable for future electronic devices, as such means typically have ultra-low power requirements and can provide coherent control. In recent years, great experimental progress has been made in the field of electrical manipulation of magnetism in numerous material systems. These studies generally do not consider the directionality of the applied non-magnetic potentials and/or magnetism switching. Here, we theoretically conceive and experimentally demonstrate a non-magnetic one-way spin switch device using a spin-orbit coupled Bose–Einstein condensate subjected to a moving spin-independent repulsive dipole potential. The physical foundation of this unidirectional device is based on the breakdown of Galilean invariance in the presence of spin-orbit coupling. Such a one-way spin switch opens an avenue for designing quantum devices with unique functionalities and may facilitate further experimental investigations of other one-way spintronic and atomtronic devices.