Charge Density Waves and x=1/8 anomaly in La₂₋ₓ₋y(Nd,Eu)y(Ba,Sr)ₓCuO₄
Larionov, I. A. · Eremin, M. V.
Original · EN
We adopt a t₁-t₂-t₃-J-G model for explanation of x=1/8 anomaly in La₂₋ₓSrₓCuO₄ 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 t₁eff, t₂eff, t₃eff<G. For physically realistic hopping values we obtain the CDW amplitude eQ=x. The in-phase domain structure as a candidate for "stripe" picture is proposed.
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