In ferroelectric Bi monolayer, polarization rotates through a soft-mode landscape with a barrier four times lower than collinear reversal and drives a spin Chern number change from −2 to 0.
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Polarization Rotation Drives a Spin-Topological Transition in Ferroelectric Bismuth Monolayer
In ferroelectric Bi monolayer, polarization rotates through a soft-mode landscape with a barrier four times lower than collinear reversal and drives a spin Chern number change from −2 to 0.