Venise et le rêve

Campi, Édith; Chaboudez, Gisèle

doi:10.3917/herm.campi.2015.01

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“…The stripe inhomogeneity of the lattice due to i) ordering of oxygen interstitials in ordered domains [35] ii) oxygen mobility at high temperature and the electron-lattice interaction at low temperature in nickelates and cuprates is controlled by the lattice mismatch between the CuO 2 or NiO 2 2D atomic layers and the La 2 O 2+δ blocks layers. [36,37] which is key feature for the lattice stripes phase in cuprates [38,39]. La 2 NiO 4+δ is isostructural with the widely studied La 2 CuO 4+δ which could make its band structure very similar to optimally doped La 2 CuO 4 (LCO) [40,41], even if the band filling is different.…”

Section: Introductionmentioning

confidence: 99%

Electronic Structure of Superoxygenated La2NiO4 Domains with Ordered Oxygen Interstitials

Jarlborg

Bianconi

2015

J Supercond Nov Magn

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The electronic structures of La2NiO 4+δ , where additional oxygen interstitials are forming stripes along (1,1,0), are presented. Spin-polarized calculations show that ferromagnetism on Ni sites is reduced near the stripes and enhanced far from the stripes. Totally the magnetic moment becomes reduced because of oxygen interstitials. It is suggested that the oxygen interstitial concentration in oxygen rich domains in nickelates suppress magnetism and give multiband metallic domains.

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