Two dimensional model for correlated eg electrons in doped nickelates

Two dimensional model for correlated eg electrons in doped nickelates

We investigate the magnetic, orbital and charge instabilities in eg band for the average filling by n = 2 – x electrons per site, as in La2–x Srx NiO4. The calculations were performed on 8 × 8 clusters, with electron correlations included within the local ansatz method. The C ‐type antiferromagnetic...

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Veröffentlicht in:Physica Status Solidi (b) 2006-01, Vol.243 (1), p.155-158
Hauptverfasser: ROSCISZEWSKI, Krzysztof, OLES, Andrzej M
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Sprache:eng
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71.10.Fd
71.15.Nc
71.27.+a
75.25.+z
Collective effects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron states
Exact sciences and technology
Exchange, correlation, dielectric and magnetic functions, plasmons
General theory and models of magnetic ordering
Magnetic properties and materials
Physics
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creator ROSCISZEWSKI, Krzysztof
OLES, Andrzej M
description We investigate the magnetic, orbital and charge instabilities in eg band for the average filling by n = 2 – x electrons per site, as in La2–x Srx NiO4. The calculations were performed on 8 × 8 clusters, with electron correlations included within the local ansatz method. The C ‐type antiferromagnetic phase was found in a broad range of doping, but distinct stripe phases could not be identified. The nonuniform orbital order is present for some dopings and couples to charge and spin order. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
doi_str_mv 10.1002/pssb.200562406
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subjects 71.10.Fd
71.15.Nc
71.27.+a
75.25.+z
Collective effects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron states
Exact sciences and technology
Exchange, correlation, dielectric and magnetic functions, plasmons
General theory and models of magnetic ordering
Magnetic properties and materials
Physics
title Two dimensional model for correlated eg electrons in doped nickelates
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