(c) Schematic of the phase separation scenario. , hysteresis in the magnetic-field dependence of sample resistance for different temperatures at a fixed gate voltage, V g = − 100 V. For LaAlO 3 thicknesses above three unit cells, an electronic reconstruction occurs, transferring from the LaAlO 3 surface to the interface 1 / 2 electron per unit cell. At the interface, a polar discontinuity between neutral SrTiO 3 planes and charged LaAlO 3 planes produces a diverging potential. Figure 1: (a) The LaAlO 3 / SrTiO 3 interface. For LaAlO 3 thicknesses above three unit cells, an electronic reconstruction occurs, trans. propose that ferromagnetism is linked to oxygen vacancies, which locally produce an increase in carrier density favoring localized ferromagnetic regions (yellow), and that the electronic reconstruction is responsible for the metallic and superconducting regions.
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