Abstract:The structural, electronic, and phonon properties of the BaTiO(0 0 1) surface and the Fe/BaTiO(0 0 1) interface have been studied within the density functional theory. Attention is paid to the lattice instabilities (soft phonon modes) that induce ferroelectric distortions in the surface and the interface. A phonon-induced monoclinic (Cm) thin-film counterpart of the low-temperature rhombohedral (R3m) ferroelectric bulk BaTiO phase is found. The changes in crystal structure, electronic density of states, atomic… Show more
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