In κ-Ga2O3, polarization reversal proceeds via in-plane sliding of Ga-O layers, and the 120° lattice domain walls in real samples topologically block polarization domain wall motion, explaining the suppressed remanent polarization and coercive field.
Phase diagram and polarization of stable phases of (Ga1−xInx)2O3
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Origin of Suppressed Ferroelectricity in k-Ga$_2$O$_3$: Interplay Between Polarization and Lattice Domain Walls
In κ-Ga2O3, polarization reversal proceeds via in-plane sliding of Ga-O layers, and the 120° lattice domain walls in real samples topologically block polarization domain wall motion, explaining the suppressed remanent polarization and coercive field.