在La_{3}Ni_{2}O_{7-δ}中存在旋转密度波的证据
Kaiwen Chen1, Xiangqi Liu2, Jiachen Jiao1
1State Key Laboratory of Surface Physics, Department of Physics, <a href="https://ror.org/013q1eq08">Fudan University</a>, Shanghai 200438, China.
Physical review letters
|July 12, 2024
概括
在154K的酸盐La_{3}Ni_{2}O_{7-δ}中存在磁性秩序.这项研究使用了正子旋转放松 (μ+SR) 来研究这种材料的磁性,这对于理解超导度至关重要.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 量子材料是一种量子材料.
背景情况:
- 双层尼基酸盐La_{3}Ni_{2}O_{7-δ}的超导性最近在高临界温度下 (T_{c}高达80K) 在压力下被发现.
- 这一发现引起了人们对了解这些材料的潜在机制和相关性质的极大兴趣.
研究的目的:
- 在环境压力下研究多晶体La_{3}Ni_{2}O_{6.92}的磁性.
- 探索磁性秩序与尼基酸盐中超导电性的潜力之间的关系.
主要方法:
- 使用正子子旋转放松 (μ+SR) 光谱学.
- 在多晶La_{3}Ni_{2}O_{6.92}样本上进行零场和弱横场μ+SR实验.
主要成果:
- 零场μ+SR实验证实了La_{3}Ni_{2}O_{6.92}中存在磁顺序,其磁顺序温度 (T_{N}) 为154K.
- 弱横场μ+SR测量表明,观察到的磁性是一种散装性质.
- 发现少量的缺氧度会显著扩大内部磁场分布.
结论:
- 该研究揭示了在环境压力下La_{3}Ni_{2}O_{6.92}的内在磁顺序,先于压力诱导的超导.
- 缺氧在影响磁性和内部磁场分布方面起着至关重要的作用.
- 这些发现为尼基酸盐材料中磁性和超导性之间的复杂相互作用提供了重要的见解.
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