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Nonlinear magnon transport in bilayer van der Waals antiferromagnets

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Title
Nonlinear magnon transport in bilayer van der Waals antiferromagnets
Author(s)
Mukherjee, Rohit; Sonu Verma; Kundu, Arijit
Publication Date
2023-06
Journal
Physical Review B, v.107, no.24
Publisher
American Physical Society
Abstract
In this paper, we study the Berry curvature induced linear and nonlinear magnon transport in bilayer van der Waals antiferromagnets, where we deduce forms for the spin and energy currents within the semiclassical Boltzmann formalism under the relaxation time approximation. Even in the absence of the Dzyaloshinskii-Moriya interaction, if we turn on the layer dependent electrostatic doping (ED) potential and anisotropy in the Heisenberg interactions, the linear response remains zero, whereas we obtain a nonzero nonlinear thermal Hall response resulting from higher moments of the Berry curvature. We show that there is a sign reversal of nonlinear thermal Hall conductivity with varying strength of ED potential, which can be potentially useful in spin based technologies. We also comment on the momentum and temperature dependence of the relaxation time, which can influence the transport properties. © 2023 American Physical Society.
URI
https://pr.ibs.re.kr/handle/8788114/14146
DOI
10.1103/PhysRevB.107.245426
ISSN
2469-9950
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > 1. Journal Papers (저널논문)
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