在过度剂的La基酸盐中,命运的收费顺序
K von Arx1,2, Qisi Wang1, S Mustafi1
1Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland.
npj quantum materials
|April 26, 2024
概括
在酸盐超导体中的长距离条纹顺序在最佳的兴奋剂下消失. 在较高的兴奋剂中,短距离的相关性仍然存在,这表明电子-声声合影响了电荷顺序.
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
- 超导电性 超导电性 超导电性
背景情况:
- 条纹顺序,一个合的旋转和电荷调制,是高温铜超导体的一个关键特征.
- 这些材料中最佳兴奋剂的条纹顺序的演变仍然是争论的主题.
研究的目的:
- 系统地研究La2-xSrxCuO4和La1.8-xEu0.2SrxCuO4中的电荷相关性,使用共振无弹性X射线散射.
- 为了澄清条纹顺序的兴奋剂和温度依赖以及它与其他电子相的关系.
主要方法:
- 使用高分辨率共振无弹性X射线散射 (RIXS) 来探测电荷相关性.
- 仔细分离不弹性和弹性散射贡献,以便进行准确的分析.
- 在La2-xSrxCuO4和La1.8-xEu0.2SrxCuO4中研究了一系列的兴奋剂水平.
主要成果:
- 长距离,温度依赖的条纹顺序仅在最佳兴奋剂下观察到.
- 在较高的兴奋剂水平下,短距离,温度独立的电荷相关性出现并持续到测量最高的兴奋剂.
- 这种关联行为过渡在伪间隙临界兴奋剂水平之前.
结论:
- 在较高的兴奋剂中观察到的短距离相关性归因于电子 - 声子合,在条纹排序向量上达到顶峰.
- 在La2-xSrxCuO4中长距离静态条纹顺序消失在最佳兴奋剂附近,这对量子关键或交叉现象有影响.
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