Influence of the incommensurability in $Sr_{14-x}Ca_xCu_{24}O_{41}$ family compounds

Details Influence of the incommensurability in $Sr_{14-x}Ca_xCu_{24}O_{41}$ family compounds Influence of the incommensurability in $Sr_{14-x}Ca_xCu_{24}O_{41}$ family compounds

2003-12-15

arxiv.org/abs/cond-mat/0312369v2

Phys. Rev. Letters {\bf 92}, 236402 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.92.236402

The present paper studies the influence of the structural modulation on the low energy physics of the $Sr_{14-x}Ca_xCu_{24}O_{41}$ oxides, using ab-initio determination of the on-site and nearest neighbor effective parameters. The structural modulations appears to be the key degree of freedom, responsible for the low energy properties, such as the electron localization, the formation of dimers in the $x=0$ compound or the anti-ferromagnetic order in the $x=13.6$ compound.

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