Suppression of Intertwined Density Waves in La$_4$Ni$_{3-x}$Cu$_x$O$_{10+δ}$

Stephen Zhang; Danrui Ni; Ruyi Ke; Guangming Cheng; Nan Yao; Robert J. Cava

paper

Suppression of Intertwined Density Waves in La $_{4}$ Ni $_{3 - x}$ Cu $_{x}$ O $_{10 + δ}$

arXiv:2507.08756

Abstract

Superconductivity in La $_{4}$ Ni $_{3}$ O $_{10}$ has been reported to emerge upon suppression of intertwined spin and charge density wave (SDW/CDW) order, suggesting a possible connection to the pairing mechanism. Here we report a systematic investigation of La $_{4}$ Ni $_{3 - x}$ Cu $_{x}$ O $_{10 + δ}$ ( $0 \leq x \leq 0.7$ ), focusing on the evolution of the SDW/CDW order as a function of chemical substitution. Temperature-dependent resistivity, magnetic susceptibility, and Hall effect measurements reveal a linear suppression of density wave transition temperature $T dw$ and a concurrent enhancement of hole concentration with increasing Cu content. At higher substitution levels ( $x > 0.15$ ), the transition-induced anomaly in the resistivity becomes undetectable while a magnetic signature persists, indicating a partial decoupling of spin and charge components and the possible survival of short-range spin correlations. The absence of superconductivity across the substitution series highlights the importance of additional factors in stabilizing the superconducting state in pressurized La $_{4}$ Ni $_{3}$ O $_{10}$ .

13 pages, 4 figures

Suppression of Intertwined Density Waves in La4​Ni3−x​Cux​O10+δ​

Abstract

Suppression of Intertwined Density Waves in La $_{4}$ Ni $_{3 - x}$ Cu $_{x}$ O $_{10 + δ}$