Abstract
We investigated the spin pumping behavior in a ring conductor with the Aharonov-Casher effect. The Rashba spin-orbit interaction is the sole oscillating parameter in the proposed spin pump. Our analysis is based on the Floquet scattering matrix formula, where the infinite Floquet channels can provide alternative channels for spin transport. A finite spin current at zero dc bias is obtained in a ring conductor with broken parity symmetry, while the charge current is always zero. The motion of pumped spin is tuned by adjusting the pumping parameters. These results may be useful in simplifying the experimental realization of a spin pump with the Aharonov-Casher effect.
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