Unconventional electron states in δ-doped SmTiO3

Unconventional electron states in δ-doped SmTiO3

ABSTRACT The Mott-insulating distorted perovskite SmTiO3, doped with a single SrO layer in a quantum-well architecture is studied by the combination of density functional theory with dynamical mean-field theory. A rich correlated electronic structure in line with recent experimental investigations i...

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Main Author: Frank Lechermann
Format: Article
Language:English
Published: Nature Publishing Group 2017-05-01
Series:Scientific Reports
Online Access:https://doi.org/10.1038/s41598-017-01847-5
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spelling doaj-0e3d4730936c4d15860107200b0226242020-12-08T02:56:38ZengNature Publishing GroupScientific Reports2045-23222017-05-01711710.1038/s41598-017-01847-5Unconventional electron states in δ-doped SmTiO3Frank Lechermann0I. Institut für Theoretische Physik, Universität HamburgABSTRACT The Mott-insulating distorted perovskite SmTiO3, doped with a single SrO layer in a quantum-well architecture is studied by the combination of density functional theory with dynamical mean-field theory. A rich correlated electronic structure in line with recent experimental investigations is revealed by the given realistic many-body approach to a large-unit-cell oxide heterostructure. Coexistence of conducting and Mott-insulating TiO2 layers prone to magnetic order gives rise to multi-orbital electronic transport beyond standard Fermi-liquid theory. First hints towards a pseudogap opening due to electron-electron scattering within a background of ferromagnetic and antiferromagnetic fluctuations are detected.https://doi.org/10.1038/s41598-017-01847-5
collection DOAJ
language English
format Article
sources DOAJ
author Frank Lechermann
spellingShingle Frank Lechermann
Unconventional electron states in δ-doped SmTiO3
Scientific Reports
author_facet Frank Lechermann
author_sort Frank Lechermann
title Unconventional electron states in δ-doped SmTiO3
title_short Unconventional electron states in δ-doped SmTiO3
title_full Unconventional electron states in δ-doped SmTiO3
title_fullStr Unconventional electron states in δ-doped SmTiO3
title_full_unstemmed Unconventional electron states in δ-doped SmTiO3
title_sort unconventional electron states in δ-doped smtio3
publisher Nature Publishing Group
series Scientific Reports
issn 2045-2322
publishDate 2017-05-01
description ABSTRACT The Mott-insulating distorted perovskite SmTiO3, doped with a single SrO layer in a quantum-well architecture is studied by the combination of density functional theory with dynamical mean-field theory. A rich correlated electronic structure in line with recent experimental investigations is revealed by the given realistic many-body approach to a large-unit-cell oxide heterostructure. Coexistence of conducting and Mott-insulating TiO2 layers prone to magnetic order gives rise to multi-orbital electronic transport beyond standard Fermi-liquid theory. First hints towards a pseudogap opening due to electron-electron scattering within a background of ferromagnetic and antiferromagnetic fluctuations are detected.
url https://doi.org/10.1038/s41598-017-01847-5
work_keys_str_mv AT franklechermann unconventionalelectronstatesinddopedsmtio3
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