  We investigate pulsed laser deposition of LaGaO3/SrTiO3 at 10-1 mbar oxygen
background pressure, demonstrating the critical effect of the
target-to-substrate distance, dTS, on the interface sheet resistance, Rs. The
interface turns from insulating to metallic by progressively decreasing dTS.
The analysis of the LaGaO3 plume evidences the important role of the plume
propagation dynamics on the interface properties. These results demonstrate the
growth of conducting interfaces at an oxygen pressure of 10-1 mbar, an
experimental condition where a well-oxygenated heterostructures with a reduced
content of oxygen defects is expected.
