Nonlinear Hall effect and multichannel conduction in LaTiO 3/SrTiO3 superlattices

J. S. Kim, S. S.A. Seo, M. F. Chisholm, R. K. Kremer, H. U. Habermeier, B. Keimer, H. N. Lee

Research output: Contribution to journalArticlepeer-review

144 Scopus citations

Abstract

We report magnetotransport properties of heterointerfaces between the Mott insulator LaTiO3 and the band insulator SrTiO3 in a delta-doping geometry. At low temperatures, we have found a strong nonlinearity in the magnetic field dependence of the Hall resistivity, which can be effectively controlled by varying the temperature and the electric field. We attribute this effect to multichannel conduction of interfacial charges generated by an electronic reconstruction. In particular, the formation of a highly mobile conduction channel revealed by our data is explained by the greatly increased dielectric permeability of SrTiO3 at low temperatures and its electric field dependence reflects the spatial distribution of the quasi-two-dimensional electron gas.

Original languageEnglish
Article number201407
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number20
DOIs
StatePublished - Nov 17 2010

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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