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23 April 2024 |
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Article overview
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Magnon Pairs and Spin-Nematic Correlation in the Spin-Seebeck Effect | | Daichi Hirobe
; Masahiro Sato
; Masato Hagihala
; Yuki Shiomi
; Takatsugu Masuda
; Eiji Saitoh
; | | Date: |
23 Aug 2019 | | Abstract: | Investigating exotic magnetic materials with spintronic techniques is
effective at advancing magnetism as well as spintronics. In this work, we
report unusual field-induced suppression of the spin-Seebeck effect (SSE) in a
quasi one-dimensional frustrated spin-$frac{1}{2}$ magnet LiCuVO$_4$, known to
exhibit spin-nematic correlation in a wide range of external magnetic field
$B$. The suppression takes place above $|B| > 2$ T in spite of the $B$-linear
isothermal magnetization curves in the same $B$ range. The result can be
attributed to the growth of the spin-nematic correlation while increasing $B$.
The correlation stabilizes magnon pairs carrying spin-2, thereby suppressing
the interfacial spin injection of SSE by preventing the spin-1 exchange between
single magnons and conduction electrons at the interface. This interpretation
is supported by integrating thermodynamic measurements and theoretical analysis
on the SSE. | | Source: | arXiv, 1908.8701 | | Services: | Forum | Review | PDF | Favorites | |
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