光学透明度在2D铁磁WSe2/1T-VSe2/WSe2多层与应变诱导大的异常Nernst导电性
Imran Khan1, Brahim Marfoua1, Jisang Hong1
1Department of Physics, Pukyong National University, Busan 48513, Republic of Korea.
Nanotechnology
|December 6, 2023
概括
新的二维磁性材料结合了透明度和室温铁磁. WSe2/1T-VSe2/WSe2异构结构显示出透明的自旋电子和光电子的潜力.
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
- 纳米技术纳米技术
背景情况:
- 透明的电子产品需要具有光学透明度和磁性质的材料.
- 在2D材料中同时实现光学透明度和室温铁磁性是具有挑战性的.
- 两维 (2D) 过渡金属二二烯化物 (TMD) 具有独特的电子和光学性能.
研究的目的:
- 调查 WSe2/1T-VSe2/WSe2异构结构对透明电子的潜力.
- 探索2D WSe2/1T-VSe21ML) /WSe2和WSe2/1T-VSe22ML) /WSe2系统的磁性和传输特性.
- 评估应变对磁性异构性和传输性能的影响.
主要方法:
- 用第一原理计算来研究电子和磁性质.
- 使用最大局部化的Wannier函数来计算异常霍尔导电性 (AHC) 和异常Nernst导电性 (ANC).
- 分析了双轴压力应变对磁性异质性的影响.
主要成果:
- WSe2/1T-VSe21ML) /WSe2和WSe2/1T-VSe22ML) /WSe2异构体呈现室温铁磁性,其基里温度分别为328K和405K.
- 双轴压缩应变将磁性异构性从内平面切换到外平面.
- 显著的AHC (高达3.10 e2/h) 和巨大的ANC (3.94 AK-1m-1) 在压力和兴奋剂系统中观察到.
- 这些异构结构在可见光谱中具有高折射率 (3.2-3.4) 的光学透明度.
结论:
- WSe2/1T-VSe2/WSe2异构结构具有多功能物理特性,包括光学透明度和室温铁磁性.
- 这些材料是透明自旋电子和光电子应用的有希望的候选材料.
- 潜在的设备应用包括磁传感器,内存设备和透明的磁光设备.
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