在以白金为基础的矿物精石中,压力诱导的刺激子形成和超导性
Limin Wang1, Rongwei Hu1, Yash Anand1
1Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD 20742, USA.
Materials (Basel, Switzerland)
|July 27, 2024
概括
矿石 (PtAs2),是一种白金矿物质,显示压力诱导的电特性变化. 在高压 (高于92 GPa) 和低温 (接近3 K) 时,它变得超导.
科学领域:
- 固态物理 固态物理
- 材料科学 材料科学 材料科学
- 矿物物理 矿物物理
背景情况:
- 精石 (PtAs2) 是的主要天然来源.
- 了解其在极端条件下的物理性质对于材料科学和地球化学至关重要.
研究的目的:
- 为了研究高压对石 (PtAs2) 的结构和电子特性的影响.
- 为了探索压力诱导的超导性在Sperrylite的潜力.
主要方法:
- 高压X射线衍射测量高达150 GPa.
- 电阻测量作为压力和温度的函数.
- 第一原则 电子带结构计算.
主要成果:
- 没有观察到高达150GPa的结构相位过渡.
- 斑石表现出压力依赖的电气行为,从半导体过渡到金属.
- 在超过92GPa的压力下,在3K附近检测到超导电的开始.
- 计算的带结构支持运输测量,表明Lifshitz过渡和状态密度增加.
结论:
- 高压显著改变了Sperrylite的电子结构.
- 观察到的超导性可能与电子带结构的变化和激发状态有关.
- 斑岩是探索压力诱导超导的有希望的材料.
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