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- W3202991516 abstract "It is known that in chiral magnets with intrinsic inversion symmetry breaking, two spin waves moving in opposite directions can propagate at different velocities, exhibiting a phenomenon called magnetochiral nonreciprocity, which allows for realizations of certain spin logic devices such as a spin-wave diode. Here, we theoretically demonstrate that the spin-wave nonreciprocity can occur without intrinsic bulk chirality in easy-cone ferromagnets and easy-cone antiferromagnets. Specifically, we show that nonlocal injection of a spin current from proximate normal metals to easy-cone magnets engenders a nonequilibrium chiral spin texture, on top of which spin waves exhibit nonreciprocity proportional to the injected spin current. In particular, the easy-cone ferromagnet is shown to support the spin-wave nonreciprocity without an external field, in contrast to the previously known easy-plane ferromagnetic counterpart that requires an external field, thereby providing a field-free means to manipulate the spin-wave nonreciprocity. One notable feature of the nonreciprocal spin waves is their gapless nature, which can lead to a large thermal rectification effect at sufficiently low temperatures." @default.
- W3202991516 created "2021-10-11" @default.
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- W3202991516 date "2022-04-01" @default.
- W3202991516 modified "2023-10-16" @default.
- W3202991516 title "Generation of nonreciprocity in gapless spin waves by chirality injection" @default.
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- W3202991516 doi "https://doi.org/10.1103/physrevb.105.134401" @default.
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