Lanthanum Aluminate-strontium Titanate Interface
The interface between lanthanum aluminate (LaAlO3) and strontium titanate (SrTiO3) is a notable materials interface because it exhibits properties not found in its constituent materials. Individually, LaAlO3 and SrTiO3 are non-magnetic Insulator (electricity), insulators, yet LaAlO3/SrTiO3 interfaces can exhibit Electrical resistivity and conductivity, electrical metallic conductivity, superconductivity, ferromagnetism, large negative in-plane magnetoresistance, and giant persistent photoconductivity. The study of how these properties emerge at the LaAlO3/SrTiO3 interface is a growing area of research in condensed matter physics. Emergent properties Conductivity Under the right conditions, the LaAlO3/SrTiO3 interface is electrically conductive, like a metal. The angular dependence of Shubnikov–de Haas effect, Shubnikov–de Haas oscillations indicates that the conductivity is two-dimensional, leading many researchers to refer to it as a 2DEG, two-dimensional electron gas ...
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