Snir Seri, Moty Schultz, Lior Klein
We find that the sheet resistance ($R_s$) of patterned samples of ${\rm LaAlO_3}/{\rm SrTiO_3}$ with a length scale of several microns may increase significantly at low temperatures in connection with driving electrical currents and applying in-plane magnetic fields. As the samples are warmed up, $R_s$ recovers to its original value with accelerated recovery near ${\rm 70 \ K}$ and ${\rm 160 \ K}$. Concomitantly with the increase in $R_s$, the carrier density and the mobility decrease and magnetotransport properties which may be linked to magnetism are suppressed.
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http://arxiv.org/abs/1208.3837
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