Manipulation of magnetic systems by quantized surface acoustic wave via piezomagnetic effect
arXiv:2404.09423 · doi:10.1103/PhysRevApplied.23.034013
Abstract
The quantized surface acoustic wave (SAW) in the piezoelectric medium has recently been studied, and is used to control electric dipoles of quantum systems via the electric field produced through piezoelectric effect. However, it is not easy and convenient to manipulate magnetic moments directly by the electric field. We here study a quantum theory of SAW in the piezomagnetic medium. We show that the intrinsic properties of the piezomagnetic medium enable the SAW in the piezomagnetic medium to directly interact with magnetic moments of quantum systems via magnetic field induced by piezomagnetic effect. By taking the strip SAW waveguide made of piezomagnetic medium as an example, we further study the coupling strengths between different magnetic quantum systems with magnetic moments and the quantized single-mode SAW in the waveguide. Based on this, we discuss the interaction between magnetic quantum systems mediated by the quantized multi-mode SAW in piezomagnetic waveguide. Our study provides a convenient way to directly control magnetic quantum systems by quantized SAW, and offers potential applications to on-chip information processing based on solid-state quantum systems via quantized acoustic wave.
16 pages, 10 figures
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