skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Nonlinear Hall effect and multichannel conduction in LaTiO3/SrTiO3 superlattices

Abstract

We report magnetotransport properties of heterointerfaces between the Mott insulator LaTiO{sub 3} and the band insulator SrTiO{sub 3} 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 SrTiO{sub 3} at low temperatures and its electric field dependence reflects the spatial distribution of the quasi-two-dimensional electron gas.

Authors:
 [1];  [2];  [2];  [1];  [1];  [1];  [2]
  1. Max-Planck-Institut fur Feskorperforschung, Stuttgart, Germany
  2. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1001716
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 82; Journal Issue: 20; Journal ID: ISSN 1098--0121
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DIELECTRIC MATERIALS; ELECTRIC FIELDS; ELECTRON GAS; GEOMETRY; HALL EFFECT; MAGNETIC FIELDS; PERMEABILITY; SPATIAL DISTRIBUTION; SUPERLATTICES

Citation Formats

Kim, Jun Sung, Seo, Sung Seok A, Chisholm, Matthew F, Kremer, Reinhard, Habermeier, Hanns-Ulrich, Keimer, Bernhard, and Lee, Ho Nyung. Nonlinear Hall effect and multichannel conduction in LaTiO3/SrTiO3 superlattices. United States: N. p., 2010. Web. doi:10.1103/PhysRevB.82.201407.
Kim, Jun Sung, Seo, Sung Seok A, Chisholm, Matthew F, Kremer, Reinhard, Habermeier, Hanns-Ulrich, Keimer, Bernhard, & Lee, Ho Nyung. Nonlinear Hall effect and multichannel conduction in LaTiO3/SrTiO3 superlattices. United States. https://doi.org/10.1103/PhysRevB.82.201407
Kim, Jun Sung, Seo, Sung Seok A, Chisholm, Matthew F, Kremer, Reinhard, Habermeier, Hanns-Ulrich, Keimer, Bernhard, and Lee, Ho Nyung. 2010. "Nonlinear Hall effect and multichannel conduction in LaTiO3/SrTiO3 superlattices". United States. https://doi.org/10.1103/PhysRevB.82.201407.
@article{osti_1001716,
title = {Nonlinear Hall effect and multichannel conduction in LaTiO3/SrTiO3 superlattices},
author = {Kim, Jun Sung and Seo, Sung Seok A and Chisholm, Matthew F and Kremer, Reinhard and Habermeier, Hanns-Ulrich and Keimer, Bernhard and Lee, Ho Nyung},
abstractNote = {We report magnetotransport properties of heterointerfaces between the Mott insulator LaTiO{sub 3} and the band insulator SrTiO{sub 3} 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 SrTiO{sub 3} at low temperatures and its electric field dependence reflects the spatial distribution of the quasi-two-dimensional electron gas.},
doi = {10.1103/PhysRevB.82.201407},
url = {https://www.osti.gov/biblio/1001716}, journal = {Physical Review B},
issn = {1098--0121},
number = 20,
volume = 82,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2010},
month = {Fri Jan 01 00:00:00 EST 2010}
}