Wang X.G., Chotorlishvili L., Guo G.H., and Berakdar J.

We propose a new type of a spin waveguide in yttrium iron garnet solely controlled by external electric fields. Spin waves are generated by microwave electric fields while the shift of the phase between spin waves is achieved by means of static electric fields. The phase shifter operation is based on the magneto-electric coupling and effective Dzyaloshinskii Moriya interaction. The special geometry of the waveguide imposes certain asymmetry in the dispersion relationships of the spin waves. Depending on the propagation direction, the phases of the spin waves are shifted differently by the external electric field. The phase difference is entirely controlled by the driving electric fields. The proposed phase shifter can be easily incorporated into electronic circuits and in spin wave logical operations.

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