Evidence of spin density waves in La$_3$Ni$_2$O$_{7-δ}$

Kaiwen Chen; Xiangqi Liu; Jiachen Jiao; Muyuan Zou; Yixuan Luo; Qiong Wu; Ningyuan Zhang; Yanfeng Guo; Lei Shu

paper

Evidence of spin density waves in La $_{3}$ Ni $_{2}$ O $_{7 - δ}$

arXiv:2311.15717

Abstract

The recently discovered superconductivity with critical temperature $T_{c}$ up to 80 K in the double-layer Nickelate La $_{3}$ Ni $_{2}$ O $_{7 - δ}$ under pressure has drawn great attention. Here we report the positive muon spin relaxation ( $μ^{+}$ SR) study of polycrystalline La $_{3}$ Ni $_{2}$ O $_{6.92}$ under ambient pressure. Zero-field $μ^{+}$ SR experiments reveal the existence of magnetic order in La $_{3}$ Ni $_{2}$ O $_{6.92}$ with $T_{N} = 154 K$ . The weak transverse field $μ^{+}$ SR measurements confirms the bulk nature of magnetism. In addition, a small quantity of oxygen deficiencies can greatly broaden the internal magnetic field distribution sensed by muons.

Evidence of spin density waves in La3​Ni2​O7−δ​

Abstract

Evidence of spin density waves in La $_{3}$ Ni $_{2}$ O $_{7 - δ}$