Magnon-phonon coupling at the van der Waals interface and its heterostructure

在本项目中，我们建立了一种表面声波(SAW)注入技术，通过将表面声波注入原子薄的铁磁和反铁磁性层状范德华晶体和相关的异质结构衬底上来研究磁弹性耦合。利用这一技术，我们首次展示了通过向层状晶体三氯化铬(CrCl3)注入GHz表面声波(SAW)来耦合到反铁磁性层状晶体。在这种层状反铁磁体中，反铁磁自旋波模可以在Neel温度以下被激发。

In this project, we have established a technique for injecting surface acoustic waves (SAWs) through atomically thin ferromagnetic and antiferromagnetic layered van der Waals crystals and related heterostructure substrates transferred onto a piezoelectric LiNbO3 substrate to investigate magnetoelastic coupling.Using this technique, we have demonstrated for the first time the coupling of SAWs to antiferromagnetic layered crystals by injecting GHz surface acoustic waves (SAWs) into layered crystalline chromium trichloride (CrCl3). Antiferromagnetic spin wave modes can be excited below the Neel temperature in this layered antiferromagnet.