作者
Ji Zou, Stefano Bosco, Even Thingstad, Jelena Klinovaja, Daniel Loss
发表日期
2024/1/19
期刊
Physical Review Letters
卷号
132
期号
3
页码范围
036701
出版商
American Physical Society
简介
We propose an experimentally feasible dissipative spin-wave diode comprising two magnetic layers coupled via a nonmagnetic spacer. We theoretically demonstrate that the spacer mediates not only coherent interactions but also dissipative coupling. Interestingly, an appropriately engineered dissipation engenders a nonreciprocal device response, facilitating the realization of a spin-wave diode. This diode permits wave propagation in one direction alone, given that the coherent Dzyaloshinskii-Moriya (DM) interaction is balanced with the dissipative coupling. The polarity of the diode is determined by the sign of the DM interaction. Furthermore, we show that when the magnetic layers undergo incoherent pumping, the device operates as a unidirectional spin-wave amplifier. The amplifier gain is augmented by cascading multiple magnetic bilayers. By extending our model to a one-dimensional ring structure, we …
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J Zou, S Bosco, E Thingstad, J Klinovaja, D Loss - Physical Review Letters, 2024