Retrograde doping dependence of charge order in La$_{1.8-x}$Eu$_{0.2}$Sr$_x$CuO$_4$

Manfred Bucher

paper

Retrograde doping dependence of charge order in La $_{1.8 - x}$ Eu $_{0.2}$ Sr $_{x}$ CuO $_{4}$

arXiv:2111.05124

Abstract

Comparison with La $_{2 - z - x}$ Nd $_{z}$ Sr $_{x}$ CuO $_{4}$ ( $z = 0, 0.4$ ) shows that the retrograde doping dependence of charge order in La $_{1.8 - x}$ Eu $_{0.2}$ Sr $_{x}$ CuO $_{4}$ must be caused by a mechanism transcending the common charge-order generation in the hole-doped lanthanum cuprates. This could be a bond-stretching phonon with comparable momentum, $q \sim 0.24$ r.l.u., as observed in La $_{1.675}$ Eu $_{0.2}$ Sr $_{0.125}$ CuO $_{4}$ .

6 pages, 2 figures

Retrograde doping dependence of charge order in La1.8−x​Eu0.2​Srx​CuO4​

Abstract

Retrograde doping dependence of charge order in La $_{1.8 - x}$ Eu $_{0.2}$ Sr $_{x}$ CuO $_{4}$