In the last paragraph (conclusion section) of the above-mentioned letter, the first sentence should read as follows: “In conclusion, a thickness-driven antiferroelectric-to-ferroelectric, orthorhombic-to-rhombohedral phase transition of the PbZrO3 layers in epitaxial antiferroelectric/ferroelectric PbZrO3PbZr0.8Ti0.2O3 multilayers has been observed at a PbZrO3 thickness below 10 nm.”, in accordance with the entire contents of the letter and the last but one sentence of the abstract.