Typeset Using Revt E X
نویسندگان
چکیده
We adopt a t 1 − t 2 − t 3 − J − G model for explanation of x = 1/8 anomaly in La 2−x Sr x CuO 4 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 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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