Thermally activated recovery of electrical conductivity in LaAlO3/SrTiO3

Abstract

Patterned structures of LaAlO3/SrTiO3 that exhibit a decrease in their electrical conductivity below 30 K, recover their higher conductivity upon warming in a thermally activated process. Two dominant energy barriers $E_b$ are identified: $E_{b1}=0.224\pm 0.003$ eV related to conductivity recovery near 70 K and $E_{b2}=0.44\pm 0.015$ eV related to conductivity recovery near 160 K. We discuss possible linkage to structural defects such as dislocations and twin boundaries.

4 pages, 6 figures

References in corpus (3)

• Electric Field Control of the LaAlO${}_3$/SrTiO${}_3$ Interface Ground State
• Electronic properties of buried hetero-interfaces of LaAlO3 on SrTiO3
• Interplay between sheet resistance increase and magnetotransport properties in $\mathrm{LaAl}{\mathrm{O}}_3/\mathrm{SrTi}{\mathrm{O}}_3$

Cited by in corpus (2)

• Anisotropic electronic transport of the two-dimensional electron system in Al2O3/SrTiO3 heterostructures
• Temperature dependent giant resistance anomaly in LaAlO3/SrTiO3 nanostructures