Electron Scattering at Dislocations in LaAlO3/SrTiO3 Interfaces

We report experimental investigations of the effects of microstructural defects and of disorder on the properties of 2D electron gases at oxide interfaces. The cross section for scattering of electrons at dislocations in LaAlO3/SrTiO3 interfaces has been measured and found to equal approximate to 5 nm. Our experiments reveal that the transport properties of these electron gases are strongly influenced by scattering at dislocation cores.