用集成的多参数量子传感器在压缩双层尼基酸盐中成像Meissner效应
Junyan Wen1,2, Yue Xu1,2, Gang Wang1,2
1Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
National science review
|October 3, 2025
概括
研究人员使用量子传感器证实了La3Ni2O7-δ中的Meissner效应,解决了关于这种压力下尼基酸盐材料中高温超导性的争论.
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
- 量子传感器是一种量子传感器.
背景情况:
- 在80K附近的La3Ni2O7-δ中,高温超导性引起了相当大的兴趣.
- 虽然在压力下观察到零电阻,但在这种材料中的Meissner效应仍然存在争议.
研究的目的:
- 为在高压下La3Ni2O7-δ中提供Meissner效应的令人信服的证据.
- 为了澄清围绕双层尼基酸盐的超导性质的争议.
- 推进量子传感用于高压测量的应用.
主要方法:
- 在钻石天细胞中利用浅空缺 (NV) 中心作为*in situ*量子传感器.
- 执行磁场驱逐 (梅斯纳效应),拉曼光谱和磁图的同时测量.
- 采用场冷却和场加热协议来检测磁场驱逐.
主要成果:
- 观察到磁场驱逐的明显证据,证实了Meissner效应在多晶La3Ni2O7-δ.中.
- 证明了钻石量子传感器能够检测弱消磁信号的能力.
- 与非超导区域相关的不完整结构转换,与氧离子位移有关.
结论:
- 这项研究解决了关于La3Ni2O7-δ.的Meissner效应的争议.
- 强调了钻石量子传感器在极端条件下探测超导性的实用性.
- 提供了关于尼基酸盐结构和超导性之间的关系的见解.
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