Two dimensional model for correlated  e g   electrons in doped nickelates | Zendy

Rościszewski Krzysztof | Zendy; Oleś Andrzej M. | Zendy

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Two dimensional model for correlated e g electrons in doped nickelates

Author(s) -

Rościszewski Krzysztof,

Oleś Andrzej M.

Publication year - 2006

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.200562406

Subject(s) - antiferromagnetism , electron , doping , non blocking i/o , condensed matter physics , charge (physics) , spin (aerodynamics) , ansatz , physics , order (exchange) , range (aeronautics) , phase (matter) , chemistry , materials science , quantum mechanics , finance , economics , composite material , thermodynamics , biochemistry , catalysis

We investigate the magnetic, orbital and charge instabilities in e g band for the average filling by n = 2 – x electrons per site, as in La 2– x Sr x NiO 4 . 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)

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