Anomalous magneto-transport at the superconducting interface between LaAlO3 and SrTiO3

摘要

The magnetoresistance as a function of temperature and field for atomicallyflat interfaces between 8 unit cells of LaAlO3 and SrTiO3 is reported.Anomalous anisotropic behavior of the magnetoresistance is observed below 30 Kfor superconducting samples with carrier concentration of 3.5\times10^13 cm^-2. We associate this behavior to a magnetic order formed at the interface.