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Ferroelectricity-Driven Phonon Berry Curvature and Nonlinear Phonon Hall Transports

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Title
Ferroelectricity-Driven Phonon Berry Curvature and Nonlinear Phonon Hall Transports
Author(s)
Im, Jino; Choong H. Kim; Jin, Hosub
Publication Date
2022-10
Journal
NANO LETTERS, v.22, no.20, pp.8281 - 8286
Publisher
AMER CHEMICAL SOC
Abstract
Berry curvature (BC) governs topological phases of matter and generates anomalous transport. When a magnetic field is applied, phonons can acquire BC indirectly through spin-lattice coupling, leading to a linear phonon Hall effect. Here, we show that polar lattice distortion directly couples to a phonon BC dipole, which causes a switchable nonlinear phonon Hall effect. In a SnS monolayer, the in-plane ferroelectricity induces a phonon BC and leads to the phononic version of the nonvolatile BC memory effect. As a new type of ferroelectricity-phonon coupling, the phonon Rashba effect emerges and opens a mass gap in tilted Weyl phonon modes, resulting in a large phonon BC dipole. Furthermore, our ab initio non-equilibrium molecular dynamics simulations reveal that nonlinear phonon Hall transport occurs in a controllable manner via ferroelectric switching. The ferroelectricity-driven phonon BC and corresponding nonlinear phonon transports provide a novel scheme for constructing topological phononic transport/memory devices.
URI
https://pr.ibs.re.kr/handle/8788114/12659
DOI
10.1021/acs.nanolett.2c03095
ISSN
1530-6984
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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