Suppression of Octahedral Tilts and Associated Changes of Electronic Properties at Epitaxial Oxide Heterostructure Interfaces

Abstract

Epitaxial oxide interfaces with broken translational symmetry have emerged as a central paradigm behind the novel behaviors of oxide superlattices. Here, we use scanning transmission electron microscopy to demonstrate a direct, quantitative unit-cell-by-unit-cell mapping of lattice parameters and oxygen octahedral rotations across the BiFeO3-La0.7Sr0.3MnO3 interface to elucidate how the change of crystal symmetry is accommodated. Combined with low-loss electron energy loss spectroscopy imaging, we demonstrate a mesoscopic antiferrodistortive phase transition and elucidate associated changes in electronic properties in a thin layer directly adjacent to the interface.

References in corpus (4)

• Magnetic effects at the interface between nonmagnetic oxides
• First-principles study of spontaneous polarization in multiferroic BiFeO${}_3$
• The beta Phase of Multiferroic Bismuth Ferrite and its beta-gamma Metal-Insulator Transition
• Lattice polarization effects on electron-gas charge densities in ionic superlattices

Cited by in corpus (4)

• High temperature magnetic insulating phase in ultrathin La0.67Sr0.33MnO3 films
• Substrate coherency-driven octahedral rotations in perovskite oxide films
• Magnetic ordering and structural phase transitions in strained ultrathin SrRuO${}_3$/SrTiO${}_3$ superlattice
• Spin transfer in ultrathin BiFeO3 film under external electric field