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Magnetoelastic coupling enabled tunability of magnon spin current generation in two-dimensional antiferromagnets

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Title
Magnetoelastic coupling enabled tunability of magnon spin current generation in two-dimensional antiferromagnets
Author(s)
Bazazzadeh, N.; Hamdi, M.; Sungjoon Park; Khavasi, A.; Mohseni, S.M.; Sadeghi, A.
Publication Date
2021-11-01
Journal
Physical Review B, v.104, no.18
Publisher
American Physical Society
Abstract
© 2021 American Physical Society.We theoretically investigate the magnetoelastic coupling (MEC) and its effect on magnon transport in two-dimensional antiferromagnets with a honeycomb lattice. MEC coefficients along with magnetic exchange parameters and spring constants are computed for monolayers of transition-metal trichalcogenides with Néel magnetic order (MnPS3 and VPS3) and zigzag order (CrSiTe3, NiPS3, and NiPSe3) by ab initio calculations. Using these parameters, we predict that the spin-Nernst coefficient is significantly enhanced due to magnetoelastic coupling. Our study shows that although Dzyaloshinskii-Moriya interaction can produce spin-Nernst effect in these materials, other mechanisms such as magnon-phonon coupling should be taken into account. We also demonstrate that the magnetic anisotropy is an important factor for control of magnon-phonon hybridization and enhancement of the Berry curvature and thus the spin-Nernst coefficient. Our results pave the way toward gate tunable spin current generation in two-dimensional magnets by spin-Nernst effect via electric field modulation of MEC and anisotropy.
URI
https://pr.ibs.re.kr/handle/8788114/10879
DOI
10.1103/PhysRevB.104.L180402
ISSN
2469-9950
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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