Toward an artificial Mott insulator: Correlations in confined, high-density electron liquids in SrTiO3

Pouya Moetakef; Clayton A. Jackson; Jinwoo Hwang; Leon Balents; S. James Allen; Susanne Stemmer

doi:10.1103/PhysRevB.86.201102

Toward an artificial Mott insulator: Correlations in confined, high-density electron liquids in SrTiO3

Strongly Correlated Electrons 2013-11-26 v1 Mesoscale and Nanoscale Physics

Authors: Pouya Moetakef , Clayton A. Jackson , Jinwoo Hwang , Leon Balents , S. James Allen , Susanne Stemmer

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Abstract

We investigate correlation physics in high-density, two-dimensional electron liquids that reside in narrow SrTiO3 quantum wells. The quantum wells are remotely doped via an interfacial polar discontinuity and the three-dimensional (3D) carrier density is modulated by changing the width of the quantum well. It is shown that even at 3D densities well below one electron per site, short-range Coulomb interactions become apparent in transport, and an insulating state emerges at a critical density. We also discuss the role of disorder in the insulating state.

Keywords

mott insulator electron correlations sr tio3 quantum wells two-dimensional electron liquid coulomb interactions insulating state

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@article{arxiv.1210.7497,
  title  = {Toward an artificial Mott insulator: Correlations in confined, high-density electron liquids in SrTiO3},
  author = {Pouya Moetakef and Clayton A. Jackson and Jinwoo Hwang and Leon Balents and S. James Allen and Susanne Stemmer},
  journal= {arXiv preprint arXiv:1210.7497},
  year   = {2013}
}

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Accepted for publication in Physical Review B (Rapid Communication)

Toward an artificial Mott insulator: Correlations in confined, high-density electron liquids in SrTiO3

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