调整Rashba-Dresselhaus效应与非对称的异构结构接口上的铁电极化
Bangmin Zhang1, Chunhua Tang2, Ping Yang3
1Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou 510275, China. zhangbm5@mail.sysu.edu.cn.
Materials horizons
|November 7, 2023
概括
控制旋转轨道相互作用 (SOI) 是新材料的关键. 这项研究揭示了具有铁电层的不对称超级网格如何使可调节的Rashba和Dresselhaus SOI成为可能,这对于先进的电子设备至关重要.
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
- 固态化学 固态化学
背景情况:
- 旋转轨道相互作用 (SOI) 是材料性质的基础.
- 控制SOI强度为新型材料设计提供了途径.
- 铁电材料引入了独特的电子行为.
研究的目的:
- 调查不对称超级网格结构对旋转轨道相互作用的影响.
- 探索铁电在调节SOI中的作用.
- 在工程异构结构中区分Rashba和Dresselhaus SOI贡献.
主要方法:
- 不对称的超级格子的制造: [(La0.7Sr0.3MnO3) 8/ ((BaTiO3) t/ ((SrTiO3) 2) 8.
- 在 (001) SrTiO3基板上生长,具有受控的SrO或TiO2终结.
- 在平面内进行角磁阻测量.
主要成果:
- 在磁阻力中观察到两倍和四倍对称成分.
- 基于终结 (SrO-SL与TiO2-SL) 的双重对称系数表现出不同的行为.
- 归因于离子混合和铁电调节的电荷转移的不对称潜力,导致SRO-SL中的Rashba SOI和TiO2-SL中的Dresselhaus SOI占主导地位.
结论:
- 不对称的超级网格提供了一个控制SOI的平台.
- 铁电极化显著影响拉什巴和德雷塞尔豪斯SOI.
- 这些发现突出了设计材料具有量身定制的旋转轨道合效应的潜力.
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