FAPbI3 forms a metastable twin-domain network below ~100 K selected by shallow tilt energetics and slowing FA reorientation, reconciling low-temperature observations.
Phase transitions in inorganic halide perovskites from machine-learned potentials.The Journal of Physical Chemistry C2023,127, 13773–13781
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Kinetically Arrested Twin-Domain State in Formamidinium Lead Iodide
FAPbI3 forms a metastable twin-domain network below ~100 K selected by shallow tilt energetics and slowing FA reorientation, reconciling low-temperature observations.