在理想的1D韦尔阶段观测巨大的Nernst高原
Y Zhang1,2,3, J Q Cai1,2, Peng-Lu Zhao4,5,6
1High Magnetic Field Laboratory, Anhui Province Key Laboratory of Low-Energy Quantum Materials and Devices, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.
Physical review letters
|November 7, 2025
概括
研究人员在HfTe5中发现了一个巨大的Nernst效应,与理想的1D韦尔相相关. 这一发现增强了对电荷转换和热电装置的理解.
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
- 热电学是一种热电学.
背景情况:
- 对于先进的设备来说,寻找新的热电机制至关重要.
- 了解电荷转换是热电效率的关键.
研究的目的:
- 在高磁场下研究HfTe5中的Seebeck和Nernst效应.
- 探索巨大的Nernst效应的起源及其与拓相的关系.
主要方法:
- 在HfTe5.5中对Seebeck和Nernst效应的实验测量.
- 广泛应用各种磁场的应用.
- 追踪磁场驱动的相位过渡.
主要成果:
- 在超高磁场 (>10BQL) 观察到一个巨大的Nernst效应高原,在2K时高达50μV/K.
- 巨大的Nernst高原只存在于理想的1D韦尔阶段.
- 理论分析证实了1D韦尔阶段的独特热电转换机制.
结论:
- 在HfTe5中,巨大的Nernst效应归因于理想的1D韦尔相.
- 这一发现促进了对韦尔物理学和热电转换的理解.
- 对热电设备效率的显著改进的潜力.
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