Charge Density Waves and x=1/8 anomaly in La_2-x-y(Nd,Eu)_y(Ba,Sr)_xCuO₄

2002/02/26 by I. A. Larionov, Larionov, I. A., M. V. Eremin +1
Physics and Astronomy · #FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.48550/arxiv.cond-mat/0202482

LaTeX file + 3 figures in *.eps, submitted to PRL

arxiv created 2002/05/08 · arxiv updated 2009/11/30

Abstract

We adopt a t₁-t₂-t₃-J-G model for explanation of x=1/8 anomaly in La_2-xSr_xCuO₄ family compound. The calculated charge susceptibility shows a maximum near (π,π) at intermediate temperatures and near (π,π/2) as temperature approaches zero, in agreement with neutron scattering experiments. Coulomb repulsion G between the first neighbors turns out to be the source of Charge Density Waves (CDW) in narrow band t₁^eff, t₂^eff, t₃^eff<G. For physically realistic hopping values we obtain the CDW amplitude e_Q=x. The in-phase domain structure as a candidate for "stripe" picture is proposed.

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