铁电性
凝聚态物理
超晶格
材料科学
极化(电化学)
绝缘体上的硅
异质结
不对称
点反射
磁电阻
光电子学
物理
磁场
电介质
化学
硅
量子力学
物理化学
作者
Bangmin Zhang,Chunhua Tang,Ping Yang,Jingsheng Chen
出处
期刊:Materials horizons
[The Royal Society of Chemistry]
日期:2024-01-01
卷期号:11 (1): 262-270
摘要
The spin-orbit interaction (SOI) plays an essential role in materials properties, and controlling its intensity has great potential in the design of materials. In this work, asymmetric [(La0.7Sr0.3MnO3)8/(BaTiO3)t/(SrTiO3)2]8 superlattices were fabricated on (001) SrTiO3 substrate with SrO or TiO2 termination, labelled as SrO-SL and TiO2-SL, respectively. The in-plane angular magnetoresistance of the superlattices shows a combination of two- and four-fold symmetry components. The coefficient of two-fold symmetry component has opposite sign with current I along [100] and [110] directions for TiO2-SL, while it has the same sign for SrO-SL. Detailed study shows that the asymmetric cation inter-mixing and ferroelectricity-modulated electronic charge transfer induce asymmetric electronic potential for SrO-SL with dominating Rashba SOI, and symmetric electronic potential for TiO2-SL with dominating Dresselhaus SOI induced by BaTiO3. This work shows that the Rashba and Dresselhaus SOIs are sensitive to the ferroelectric polarization in the asymmetric structure.
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