Ferroelectricity modulates polaronic coupling at multiferroic interfaces

Abstract Physics of the multiferroic interfaces is currently understood mostly within a phenomenological framework based on screening polarization field and depolarizing charges. Additional effects still unexplored are band dependence interfacial charge modulation associated changes electron-phonon interaction, coupling lattice degrees freedom. Here, heterostructures colossal-magnetoresistance manganite La 1-x Sr x MnO 3 buried under ferroelectric BaTiO PbZr Ti O investigated using soft-X-ray angle-resolved photoemission. The experimental dispersions from La1-xSrxMnO3 identify coexisting two-dimensional hole three-dimensional electron carriers. modulates their density, affecting 2D holes 3D electrons with which forms large Fröhlich polarons inherently reducing mobility Our k-resolved results orbital occupancy, filling electron-lattice interaction in oxide modulated by disclose most fundamental physics these systems needed for further progress beyond-CMOS ferro-functional electronics.