Controllable charge-spin conversion in sliding multiferroic metal Fe3GaTe2
Abstract
Controlling charge--spin conversion within a single magnetic material is important for compact spintronic devices. Using first-principles calculations, symmetry analysis, and Wannier-based linear response, we study the Edelstein and spin Hall responses of sliding-ferroelectric bilayer \ce{Fe3GaTe2}. Two degenerate ground states with opposite interlayer sliding vectors and out-of-plane dipole moments are separated by a calculated switching barrier of about $16.3$~meV per unit cell. Magnetization orientation determines the allowed current-induced spin components, while ferroelectric switching induces component-selective sign reversals governed by Mz𝒯 for in-plane magnetization and by Mz for out-of-plane magnetization. The Edelstein response is strongly energy dependent, with spin accumulation approaching 2 ℏ for m∥+y under a reference field of $1$~V/Å. Momentum-resolved analysis links the TR-even and TR-odd Edelstein responses to Γ-centered constant-energy contours and localized interband features, respectively. Spin-conductivity contributions show the opposite momentum-space character, with broad sign-competing spin Berry curvature for TR-even and narrow Fermi-surface contours for TR-odd. The transverse spin Hall conductivity reaches ∼103 (ℏ/e)(S/cm) and depends strongly on ferroelectric state and magnetization direction. Magnetization rotations in the xy and xz planes reveal symmetry-allowed higher angular harmonics in both spin accumulation and spin-current responses. These results establish sliding-ferroelectric bilayer \ce{Fe3GaTe2} as a tunable platform for reconfigurable spin accumulation and spin-current generation.
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BibTeX
@misc{li2026controllable,
title = {{Controllable charge-spin conversion in sliding multiferroic metal Fe3GaTe2}},
author = {Tongrui Li and Lidong Zhang and Weiyi Pan},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.34295},
eprint = {2610.34295},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.34295},
}
RIS
TY - UNPB
TI - Controllable charge-spin conversion in sliding multiferroic metal Fe3GaTe2
AU - Tongrui Li
AU - Lidong Zhang
AU - Weiyi Pan
PY - 2026
DA - 2026/10/25
PB - arXiv
DO - 10.48550/arxiv.2610.34295
UR - https://arxiv.org/abs/2610.34295
AB - Controlling charge--spin conversion within a single magnetic material is important for compact spintronic devices. Using first-principles calculations, symmetry analysis, and Wannier-based linear response, we study the Edelstein and spin Hall responses of sliding-ferroelectric bilayer \ce{Fe3GaTe2}. Two degenerate ground states with opposite interlayer sliding vectors and out-of-plane dipole moments are separated by a calculated switching barrier of about $16.3$~meV per unit cell. Magnetization orientation determines the allowed current-induced spin components, while ferroelectric switching induces component-selective sign reversals governed by M_z𝒯 for in-plane magnetization and by M_z for out-of-plane magnetization. The Edelstein response is strongly energy dependent, with spin accumulation approaching 2 ℏ for m∥+y under a reference field of $1$~V/Å. Momentum-resolved analysis links the TR-even and TR-odd Edelstein responses to Γ-centered constant-energy contours and localized interband features, respectively. Spin-conductivity contributions show the opposite momentum-space character, with broad sign-competing spin Berry curvature for TR-even and narrow Fermi-surface contours for TR-odd. The transverse spin Hall conductivity reaches ∼10^3 (ℏ/e)(S/cm) and depends strongly on ferroelectric state and magnetization direction. Magnetization rotations in the xy and xz planes reveal symmetry-allowed higher angular harmonics in both spin accumulation and spin-current responses. These results establish sliding-ferroelectric bilayer \ce{Fe3GaTe2} as a tunable platform for reconfigurable spin accumulation and spin-current generation.
ER -