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19 April 2024 |
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Electron-magnon spin conversion and magnonic spin pumping in antiferromagnet/heavy metal heterostructure | | Xi-guang Wang
; Yao-Zhuang Nie
; L. Chotorlishvili
; Qing-lin Xia
; J. Berakdar
; Guang-hua Guo
; | | Date: |
30 Jul 2020 | | Abstract: | We study the exchange between electron and magnon spins at the interface of
an antiferromagnet and a heavy metal at finite temperatures. The underlying
physical mechanism is based on spin torque associated with the
creation/annihilation of thermal magnons with right-hand and left-hand
polarization. The creation/annihilation process depends strongly on the
relative orientation between the polarization of the electron and the magnon
spins. For a sufficiently strong spin transfer torque (STT), the conversion
process becomes nonlinear, generating a nonzero net spin pumping current in the
AFM that can detected in the neighboring metal layer. Applying an external
magnetic field renders possible the manipulation of the STT driving thermal
spin pumping. Our theoretical results are experimentally feasible and are of a
direct relevance to antiferromagnet-based spintronic devices. | | Source: | arXiv, 2007.15512 | | Services: | Forum | Review | PDF | Favorites | |
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