The transport and thermoelectric properties of the interface between SrTiO 3 and a 26-monolayer-thick LaAlO 3 layer grown at high oxygen pressure have been investigated at temperatures from 4.2 to 100 K and in magnetic fields up to 18 T. For T>4.2K , two different electronlike charge carriers originating from two electron channels which contribute to transport are observed. We probe the contributions of a degenerate and a nondegenerate band to the thermoelectric power and develop a consistent model to describe the temperature dependence of the thermoelectric tensor. Anomalies in the data point to an additional magnetic field dependent scattering.
|Journal||Physical Review B (Condensed Matter and Materials Physics)|
|Publication status||Published - 2015|