Localization of Two-dimensional Electron Gas in LaAlO3/SrTiO3 Heterostructures

Details Localization of Two-dimensional Electron Gas in LaAlO3/SrTiO3 Heterostructures Localization of Two-dimensional Electron Gas in LaAlO3/SrTiO3 Heterostructures

2011-10-14

arxiv.org/abs/1110.3252v1

Physics

Condensed Matter

Strongly Correlated Electrons

12 pages, 4 figures

Scientific paper

We report strong localization of 2D electron gas in LaAlO3 / SrTiO3 epitaxial thin-film heterostructures grown on (LaAlO3)0.3-(Sr2AlTaO3)0.7 substrates by using pulsed laser deposition with in-situ reflection high-energy electron diffraction. Using longitudinal and transverse magnetotransport measurements, we have determined that disorder at the interface influences the conduction behavior, and that increasing the carrier concentration by growing at lower oxygen partial pressure changes the conduction from strongly localized at low carrier concentration to metallic at higher carrier concentration, with indications of weak localization. We interpret this behavior in terms of a changing occupation of Ti 3d bands near the interface, each with a different spatial extent and susceptibility to localization by disorder, and differences in carrier confinement due to misfit strain and point defects.

Affiliated with

Also associated with

No associations

Rating

Localization of Two-dimensional Electron Gas in LaAlO3/SrTiO3 Heterostructures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Localization of Two-dimensional Electron Gas in LaAlO3/SrTiO3 Heterostructures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Localization of Two-dimensional Electron Gas in LaAlO3/SrTiO3 Heterostructures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-523550