Charge Density Waves and $x=1/8$ anomaly in La$_{2-x-y}$(Nd,Eu)$_y$(Ba,Sr)$_x$CuO$_4$

Details Charge Density Waves and $x=1/8$ anomaly in La$_{2-x-y}$(Nd,Eu)$_y$(Ba,Sr)$_x$CuO$_4$ Charge Density Waves and $x=1/8$ anomaly in La$_{2-x-y}$(Nd,Eu)$_y$(Ba,Sr)$_x$CuO$_4$

2002-02-26

arxiv.org/abs/cond-mat/0202482v2

Physics

Condensed Matter

Superconductivity

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

Scientific paper

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 $(\pi,\pi)$ at intermediate temperatures and near $(\pi,\pi/2)$ 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_1^{\mathit{eff}}, t_2^{\mathit{eff}}, t_3^{\mathit{eff}}

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