Structure-Property Relation of SrTiO3-LaAlO3 Interfaces

Details Structure-Property Relation of SrTiO3-LaAlO3 Interfaces Structure-Property Relation of SrTiO3-LaAlO3 Interfaces

2008-09-05

arxiv.org/abs/0809.1068v1

Physics

Condensed Matter

Strongly Correlated Electrons

46 pages, 16 figures, to be published as progress report in Advanced Materials

Scientific paper

A large variety of transport properties have been observed at the interface between the insulating oxides SrTiO3 and LaAlO3 such as insulation, 2D interface metallicity, 3D bulk metallicity, Kondo scattering, magnetism and superconductivity. The relation between the structure and the properties of the SrTiO3-LaAlO3 interface can be explained in a meaningful way by taking into account the relative contribution of three structural aspects: oxygen vacancies, structural deformations (including cation disorder) and electronic interface reconstruction. The emerging phase diagram is much richer than for related bulk oxides due to the occurrence of interface electronic reconstruction. The observation of this interface phenomenon is a display of recent advances in thin film deposition and characterization techniques, and provides an extension to the range of exceptional electronic properties of complex oxides.

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