DFT calculations show weak valley-layer coupling in centrosymmetric FeCl2 that allows electric-field-switchable valley polarization, and a PT-symmetric bilayer that polarizes spontaneously.
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Weak valley-layer coupling and valley polarization in centrosymmetric $\mathrm{FeCl_2}$ monolayer
DFT calculations show weak valley-layer coupling in centrosymmetric FeCl2 that allows electric-field-switchable valley polarization, and a PT-symmetric bilayer that polarizes spontaneously.