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电荷密度波诱导的节点线在LaTe中3
Shuvam Sarkar1, Joydipto Bhattacharya2,3, Pampa Sadhukhan1
1UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore, 452001, Madhya Pradesh, India.
Nature communications
|June 19, 2023
概括
兰化 (LaTe3) 呈现克莱默斯节点线,这是一个独特的拓特征. 这条节点线在费米水平上创造了无间隙交叉,这一点得到了光谱学和理论的证实.
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
- 拓学材料 拓学材料
背景情况:
- 拉3是一种非中心对称的材料,其Te双层中存在电荷密度波.
- 具有时间逆向对称性的材料可以容纳异国情调的拓电子状态.
研究的目的:
- 在LaTe3.3中调查和确认克莱默斯结节线的存在.
- 了解LaTe3.3的电子带结构和拓性质.
主要方法:
- 角度分辨率光辐射光谱学 (ARPES)
- 密度函数理论 (DFT) 的计算.
- 使用带展开的带结构计算.
- 对称分析对称性分析
主要成果:
- 实验和理论证据证实了拉铁3.3中的克莱默斯节点线.
- 节点线导致电荷密度波诱导的阴影波段和主波段之间的无间隙交叉.
- 这些交叉发生在高费米速度的费米水平上,并且形成无旋转节点线.
结论:
- 在LaTe3中,有一个拓学上非微不足道的克拉默斯节点线.
- 电荷密度波和旋转轨道合之间的相互作用决定了观察到的电子结构.
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