在迪拉克半金属PdTe中通过点接触光谱学证明了非传统的超导性
Pritam Das1, Sulagna Dutta1, Saurav Suman1
1Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, Maharashtra 400005, India.
Journal of physics. Condensed matter : an Institute of Physics journal
|November 25, 2025
概括
化表现出非常规的超导性. 接触点安德里耶夫反射光谱揭示了一种异型配对对称性,表明了超出传统理论的复杂相互作用.
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:
- telluride (PdTe) 是一种非分层的迪拉克半金属,具有显著的超导性能.
- 了解它的超导状态对于探索新的量子现象至关重要.
研究的目的:
- 为了研究PdTe.Te中的超导间隙大小和对称性.
- 为了确定这个迪拉克半金属中的配对机制.
主要方法:
- 接触点安德里耶夫反射光谱法 (PCAR) 用于探测超导状态.
- 测量是在低至2K的温度下进行的,有或没有应用磁场.
- 数据分析使用了Blonder-Tinkham-Klapwijk形式主义,评估了s波,多频段s+s波,p波和d波对称性.
主要成果:
- 传统的s波和多频段s+s波模型无法准确地描述实验中的光谱特征.
- 不同类型的p波和d波模型为数据提供了很好的匹配.
- 结果表明节点异型差距结构和偏离标准BCS理论.
结论:
- PdTe表现出非常规的超导性,具有异构的间隙结构.
- 这些发现强烈暗示PdTe.中存在非传统的配对对称性.
- 这凸显了迪拉克半金属中的配对相互作用的复杂性质.
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