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Title: Metallic Interface at the Boundary Between Band and Mott Insulators

Abstract

Motivated by experiments on atomically smooth layers of LaTiO3, a Mott insulator, sandwiched between layers of SrTiO3, a band insulator, a simple model for such heterostructures is studied using quasi one-dimensional lattices and the Lanczos method. Taking both the local and long-range Coulomb interactions into account, and computing the layer dependent local density of states, a metallic state was found at the interface whose extent strongly depends on the dielectric constant of the material. We also observed that the antiferromagnetic correlations in the bulk Mott phase persist into the metallic region. Our conclusions are in excellent agreement with recently reported results for this model in the opposite limit of infinite dimensions6,7, thus providing an alternative tool to study electronic reconstruction effects in heterostructures.

Authors:
 [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC)
OSTI Identifier:
931707
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review B; Journal Volume: 74
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; LANTHANUM OXIDES; STRONTIUM OXIDES; ELECTRICAL INSULATORS; PERMITTIVITY; INTERFACES; TITANIUM OXIDES; MATHEMATICAL MODELS; COULOMB FIELD; metallic interface; Mott

Citation Formats

Kancharla, Srivenkateswara S, and Dagotto, Elbio R. Metallic Interface at the Boundary Between Band and Mott Insulators. United States: N. p., 2006. Web. doi:10.1103/PhysRevB.74.195427.
Kancharla, Srivenkateswara S, & Dagotto, Elbio R. Metallic Interface at the Boundary Between Band and Mott Insulators. United States. doi:10.1103/PhysRevB.74.195427.
Kancharla, Srivenkateswara S, and Dagotto, Elbio R. Sun . "Metallic Interface at the Boundary Between Band and Mott Insulators". United States. doi:10.1103/PhysRevB.74.195427.
@article{osti_931707,
title = {Metallic Interface at the Boundary Between Band and Mott Insulators},
author = {Kancharla, Srivenkateswara S and Dagotto, Elbio R},
abstractNote = {Motivated by experiments on atomically smooth layers of LaTiO3, a Mott insulator, sandwiched between layers of SrTiO3, a band insulator, a simple model for such heterostructures is studied using quasi one-dimensional lattices and the Lanczos method. Taking both the local and long-range Coulomb interactions into account, and computing the layer dependent local density of states, a metallic state was found at the interface whose extent strongly depends on the dielectric constant of the material. We also observed that the antiferromagnetic correlations in the bulk Mott phase persist into the metallic region. Our conclusions are in excellent agreement with recently reported results for this model in the opposite limit of infinite dimensions6,7, thus providing an alternative tool to study electronic reconstruction effects in heterostructures.},
doi = {10.1103/PhysRevB.74.195427},
journal = {Physical Review B},
number = ,
volume = 74,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}