Tuning Rashba–Dresselhaus effect with ferroelectric polarization at asymmetric heterostructural interface†

IF 12.2 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Materials Horizons Pub Date : 2023-10-24 DOI:10.1039/D3MH00635B

Bangmin Zhang, Chunhua Tang, Ping Yang and Jingsheng Chen

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Abstract

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 [(La_0.7Sr_0.3MnO₃)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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在非对称异质结构界面上用铁电极化调节Rashba-Dresselhaus效应。

自旋轨道相互作用（SOI）在材料性能中起着至关重要的作用，控制其强度在材料设计中具有很大的潜力。在本工作中，在具有SrO或TiO2终止的（001）SrTiO3衬底上制备了不对称[（La0.7Sr0.3MnO3）8/（BaTiO3）t/（SrTiO3）2]8超晶格，分别标记为SrO SL和TiO2 SL。超晶格的平面内角磁阻表现出两重和四重对称分量的组合。TiO2-SL的二重对称分量系数与电流I沿[100]和[110]方向具有相反的符号，而SrO-SL具有相同的符号。详细的研究表明，不对称的阳离子相互混合和铁电调制的电子电荷转移诱导了以Rashba SOI为主的SrO SL的不对称电子势，以及BaTiO3诱导的以Dresselhaus SOI为主导的TiO2 SL的对称电子势。这项工作表明，Rashba和Dresselhaus SOI对不对称结构中的铁电极化很敏感。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Horizons CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

18.90

自引率

2.30%

发文量

306

审稿时长

1.3 months

期刊介绍： Materials Horizons is a leading journal in materials science that focuses on publishing exceptionally high-quality and innovative research. The journal prioritizes original research that introduces new concepts or ways of thinking, rather than solely reporting technological advancements. However, groundbreaking articles featuring record-breaking material performance may also be published. To be considered for publication, the work must be of significant interest to our community-spanning readership. Starting from 2021, all articles published in Materials Horizons will be indexed in MEDLINE©. The journal publishes various types of articles, including Communications, Reviews, Opinion pieces, Focus articles, and Comments. It serves as a core journal for researchers from academia, government, and industry across all areas of materials research. Materials Horizons is a Transformative Journal and compliant with Plan S. It has an impact factor of 13.3 and is indexed in MEDLINE.