Abstract
We adopt a t 1-t 2-t 3-J-G model for explanation of x = 1/8 anomaly in La2 − x Sr x CuO4 family compound. The calculated charge susceptibility shows a maximum near Q = (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 t eff 1, t eff 2, t eff 3 < 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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Larionov, I.A., Eremin, M.V. Microscopic Scenario for x = 1/8 Anomaly in La2 − x Sr x CuO4 . Journal of Superconductivity 15, 389–392 (2002). https://doi.org/10.1023/A:1021082516382
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DOI: https://doi.org/10.1023/A:1021082516382