强大的电荷密度波相关性在最佳杂的YBa_{2}Cu_{3}O_{y}中
Rui Zhou1, Igor Vinograd1, Hadrien Mayaffre1
1EMFL, UPS, INSA-T, Université Grenoble Alpes, LNCMI, CNRS, Grenoble, France.
Physical review letters
|September 22, 2025
概括
充电密度波 (CDW) 顺序在YBa2Cu3Oy中在最佳注下持续存在. 它的相位边界受到无序和超导的影响,挑战了对其在酸盐中的范围的现有观点.
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:
- 电荷密度波 (CDW) 顺序是高温铜超导体的一个重要特征.
- 精确的阶段边界和CDW顺序与 cuprates中的其他阶段之间的关系尚未完全理解,仍然是争论的主题.
研究的目的:
- 为了研究YBa2Cu3Oy在不同注水平上的静电电荷密度波 (CDW) 顺序的存在和行为.
- 为了确定诸如兴奋剂,灭障碍和超导电等因素如何影响CDW相位边界.
- 重新评估被广泛接受的临界兴奋剂度 (p*),用于伪间隙阶段的结束.
主要方法:
- 核磁共振 (NMR) 光谱被用来探测YBa2Cu3Oy样本的电子特性.
- 对具有不同兴奋剂水平的样本进行了NMR测量,包括最佳兴奋剂 (p=0.165) 和过度兴奋剂 (p=0.184) 方案.
主要成果:
- 短距离静态CDW顺序在最佳兴奋剂 (p=0.165) 中被发现是稳健的,其特性与低兴奋剂样本 (p0.11) 相似.
- 在过度剂样本 (p=0.184) 下到超导过渡温度 (Tc) 没有检测到静态CDW顺序,尽管在Tc以下可能出现弱CDW顺序.
- 这项研究表明,灭的障碍和与超导性的竞争会影响观察到的CDW相极,可能导致其内在兴奋剂范围的低估.
结论:
- 这些发现表明,静态CDW顺序在兴奋剂中比以前认为的更持久.
- 这些结果挑战了CDW相极位于YBa2Cu3Oy中的p*0.19以下的概念.
- 对CDW秩序,超导和混乱之间的相互作用有更全面的理解,这对酸盐物理学至关重要.
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