Magnon polarons in the spin Peltier effect
Magnon polarons in the spin Peltier effect
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DOI：
10.1103/physrevb.101.024407
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发表时间：
2019-12
影响因子：
3.7
通讯作者：
Reimei Yahiro;T. Kikkawa;R. Ramos;K. Oyanagi;T. Hioki;S. Daimon;E. Saitoh
中科院分区：
文献类型：
--
作者：
Reimei Yahiro;T. Kikkawa;R. Ramos;K. Oyanagi;T. Hioki;S. Daimon;E. Saitoh
我们报道了在Pt接触的Lu$_{2}$Bi$_{1}$Fe$_{4}$Ga$_{1}$O$_{12}$（比加：LuIG）中，在自旋珀耳帖效应（SPE）的磁场依赖性中观察到由杂化磁振子-声子激发（磁振子极化子）引起的异常峰结构。SPE峰与磁振子-极化子形成阈值的磁场一致，与先前在自旋塞贝克效应中的观察一致。SPE的增强归因于比加：LuIG中磁振子-声子杂化引起的自旋电流寿命增加。
We report the observation of anomalous peak structures induced by hybridized magnon-phonon excitation (magnon polarons) in the magnetic field dependence of the spin Peltier effect (SPE) in a Lu$_{2}$Bi$_{1}$Fe$_{4}$Ga$_{1}$O$_{12}$ (BiGa:LuIG) with Pt contact. The SPE peaks coincide with magnetic fields tuned to the threshold of magnon-polaron formation, consistent with the previous observation in the spin Seebeck effect. The enhancement of SPE is attributed to the lifetime increase in spin current caused by magnon-phonon hybridization in BiGa:LuIG.