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International audienceThe effects of the bonding mechanism and band alignment in a ferroelectric (FE) BaTiO3/ferromagneticLa0.6Sr0.4MnO3 heterostructure are studied using x-ray photoelectron spectroscopy and first-principles calculations.The band lineup at the interface is determined by a combination of band bending and polarization-inducedmodification of core-hole screening. A Schottky barrier height for electrons of 1.22 ± 0.17 eV is obtained inthe case of downwards FE polarization of the top layer. The symmetry of the bonding states is emphasizedby integrating the local density of states ±0.2 eV around the Fermi level, and strong dependence on the FEpolarization is found: upwards, polarization stabilizes Ti t2g(xy) orbitals, while downwards, polarization favorsTi t2g(yz) symmetry. It is predicted that the abrupt (La,Sr)|TiO2 interface is magnetoelectrically active, leading toa A-type antiferromagnetic coupling of the first TiO2 interface layer with the underlying manganite layer througha superexchange mechanis

physical review b

Influence of hole depletion and depolarizing field on the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>BaTiO</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mo>/</mml:mo><mml:msub><mml:mi>La</mml:mi><mml:mrow><mml:mn>0.6</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>Sr</mml:mi><mml:mrow><mml:mn>0.4</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>MnO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>interface electronic structure revealed by …

Influence of hole depletion and depolarizing field on theBaTiO3/La0.6Sr0.4MnO3interface electronic structure revealed by …