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Claudia Cantoni, Jaume Gazquez, Fabio Miletto Granozio, Mark P. Oxley, Maria Varela, Andrew R. Lupini, Stephen J. Pennycook, Carmela Aruta, Umberto Scotti di Uccio, Paolo Perna and Davide Maccariello Electron Transfer and Ionic Displacements at the Origin of the 2D Electron Gas at the LAO/STO Interface: Direct Measurements with Atomic-Column Spatial Resolution Advanced Materials 24

Article first published online: 19 JUN 2012 | DOI: 10.1002/adma.201200667

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Using state-of-the-art, aberration-corrected scanning transmission electron microscopy and electron energy loss spectroscopy with atomic-scale spatial resolution, experimental evidence for an intrinsic electronic reconstruction at the LAO/STO interface is shown. Simultaneous measurements of interfacial electron density and system polarization are crucial for establishing the highly debated origin of the 2D electron gas.

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