Defect-Charge-Driven Pyramidal Domain Walls in Ferroelectric BiFeO3
Phase-field simulation within the Landau-Ginzburg-Devonshire framework showing that spatially homogeneous defect charges, screening the bound charge at head-to-head and tail-to-tail 180-degree walls, drive the self-assembly of the dense zigzag/pyramidal triangular domain structure observed by TEM in single-crystal BiFeO3. Explains the physical origin of self-similar nanoscale domain periodicity and points toward engineering materials with tunable self-assembled domain structures.
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Pyramidal charged domain walls in ferroelectric BiFeO3 Pavel Marton1,2*, Marek Pa´sciak2, Mauro
Charged domain walls are interfaces in a ferroelectric where the spontaneous polarization of adjacent domains meets head-to-head or tail-to-tail, accumulating bound charge that must be screened. Usin…