基于Th的化合物中的Spin Hall和Spin Nernst效应:电子-声子拓学的初始研究
Jaspreet Singh1, Anna Delin2,3,4, G Vaitheeswaran5
1Department of Physics, Indian Institute of Technology Hyderabad Kandi, Sangareddy 502285, Telangana, India.
Journal of physics. Condensed matter : an Institute of Physics journal
|November 19, 2025
概括
基于的化合物ThAsS,ThAsSe和ThSbSe表现出显著的旋转霍尔效应 (SHE) 和旋转纳恩斯特效应 (SNE). 这些拓材料为自旋和自旋热力电子应用提供了可调节的特性.
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
- 量子材料 量子材料是一种量子材料.
背景情况:
- 旋转霍尔效应 (SHE) 和旋转纳恩斯特效应 (SNE) 对于产生和操纵旋转电流至关重要.
- 发现具有增强SHE和SNE的材料对于推进旋转电子和旋转热电子技术至关重要.
- 拓材料具有独特的电子和音声特性,有可能用于新型设备应用.
研究的目的:
- 使用ab initio方法系统地研究ThAsS,ThAsSe和ThSbSe中的电子和声学拓,SHE和SNE.
- 确定这些材料中强烈的SHE和SNE的起源,并探索调整其属性的方法.
- 探索这些基于Th的化合物的潜力,用于旋转式和旋转式热量的应用.
主要方法:
- 最初的电子结构计算,包括旋转轨道合 (SOC) 的影响.
- 瓦尼尔紧固结合模型用于计算自旋霍尔导电性 (SHC) 和自旋纳斯特导电性 (SNC).
- 声分散分析用于研究声拓学.
主要成果:
- ThAsS,ThAsSe和ThSbSe被确定为具有节点线和新兴退化的非碎拓材料.
- 观察到显著的SHE和SNE,可以根据电场方向,费米水平和SOC强度调整.
- 波分析揭示了ThAsS中的二次节点线,节点表面状态,以及沙钟节点循环.
结论:
- 基于Th的化合物ThAsS,ThAsSe和ThSbSe是实现大型SHE和SNE的有希望的候选物.
- 拓电子和音声结构是观察到的自旋传输特性的关键.
- 这些材料为探索基本物理和开发下一代自旋电子设备提供了一个可调的平台.
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