Experimental realization of a non-magnetic one-way spin switch

Maren E. Mossman, Junpeng Hou, Xi-Wang Luo, Chuanwei Zhang () and Peter Engels ()
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Maren E. Mossman: Washington State University
Junpeng Hou: The University of Texas at Dallas
Xi-Wang Luo: The University of Texas at Dallas
Chuanwei Zhang: The University of Texas at Dallas
Peter Engels: Washington State University

Nature Communications, 2019, vol. 10, issue 1, 1-7

Abstract: Abstract 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.

Date: 2019
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DOI: 10.1038/s41467-019-11210-z

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