Superconducting Properties of La$_2$(Cu$_{1-x}$Ni_x)$_5$As$_3$O$_2$: A $\rm \mu$SR Study
- Resource Type
- Working Paper
- Authors
- Wu, Qiong; Chen, Kaiwen; Zhu, Zihao; Tan, Cheng; Yang, Yanxing; Li, Xin; Shiroka, Toni; Chen, Xu; Guo, Jiangang; Chen, Xiaolong; Shu, Lei
- Source
- Phys. Rev. B 107, 214502 (2003)
- Subject
- Condensed Matter - Superconductivity
Condensed Matter - Strongly Correlated Electrons
- Language
We report the results of muon spin rotation and relaxation ($\rm \mu$SR) measurements on the recently discovered layered Cu-based superconducting material La$_{2}($Cu$_{1-x}$Ni$_{x}$)$_{5}$As$_{3}$O$_{2}$ ($x =$ 0.40, 0.45). Transverse-field $\rm \mu$SR experiments on both samples show that the temperature dependence of superfluid density is best described by a two-band model. The absolute values of zero-temperature magnetic penetration depth $\lambda_{\rm ab}(0)$ were found to be 427(1.7) nm and 422(1.5) nm for $x =$ 0.40 and 0.45, respectively. Both compounds are located between the unconventional and the standard BCS superconductors in the Uemura plot. No evidence of time-reversal symmetry (TRS) breaking in the superconducting state is suggested by zero-field $\rm \mu$SR measurements.