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Spin-sensitive atom scattering via spin-orbit interaction

Abstract

We study the spin-sensitive scattering of the spin-orbit (SO) coupled cold atom subject to a moving spin-independent rectangular potential barrier. Due to that SO coupling breaks Galilean invariance, the spin orientation of the atom can be switched unidirectionally and thus can serve as a one-way spin switch. Different atomic scattering processes are analyzed at different barrier velocities. We explore the spin polarization rate and the transmission coefficient in a wide range of barrier velocities and find good agreement with the corresponding experiment. The spin switch can reach an efficiency close to 1 at appropriate parameters. This study presents a comprehensive understanding of the physical mechanism underlying the system’s function as a spintronic device.

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Correspondence to Lu Zhou.

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Zheng, RF., Li, ZC., Qin, JL. et al. Spin-sensitive atom scattering via spin-orbit interaction. Eur. Phys. J. D 74, 226 (2020). https://doi.org/10.1140/epjd/e2020-10379-9

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  • DOI: https://doi.org/10.1140/epjd/e2020-10379-9

Keywords

  • Atomic Physics