门可调节PbTe薄膜的弱反局部化和负磁电阻
Huizhen Li1,2, Kang Li1,2, Wenyu Hu3
1Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, People's Republic of China.
The journal of physical chemistry letters
|January 27, 2025
概括
这项研究揭示了PbTe薄膜中的电子-电子相互作用,并解释了使用贝里相的弱反局部化和弱局部化之间的过渡. 微观障碍驱动复杂的磁传输现象.
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
- 固态物理 固态物理
背景情况:
- Telluride (PbTe) 薄膜对于热电应用至关重要.
- 了解它们的电磁传输特性是设备优化的关键.
- 门电压调制提供了一种调整载波行为的方法.
研究的目的:
- 在门电压调制下系统地研究PbTe薄膜的电磁传输特性.
- 阐明电子-电子相互作用和载体类型在磁传输中的作用.
- 解释弱反局部化 (WAL) 和弱局部化 (WL) 现象之间的过渡.
主要方法:
- 系统地研究电磁传输特性.
- 网关电压调节的应用来调整载体度.
- 使用贝里相分析来理解本地化过渡.
- 采用三电阻模型来分析R-T曲线和磁阻.
主要成果:
- 显著的电子与电子相互作用仅在孔载体模式中被观察到.
- 贝里阶段成功地解释了WAL和WL之间的门电压和温度依赖的过渡.
- 三电阻模型与特征温度,电子孔共存和非单调负磁电阻 (NMR) 相关联.
结论:
- 微观障碍是PbTe薄膜中复杂的磁传输现象的主要原因.
- 门电压和温度是控制磁传输特性的有效参数.
- 这些发现为操纵PbTe薄膜的磁传输行为提供了新的途径.
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