Issue 1, 2024

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

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 [(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.

Graphical abstract: Tuning Rashba–Dresselhaus effect with ferroelectric polarization at asymmetric heterostructural interface

  • This article is part of the themed collection: #MyFirstMH

Supplementary files

Article information

Article type
Communication
Submitted
26 apr 2023
Accepted
24 okt 2023
First published
24 okt 2023

Mater. Horiz., 2024,11, 262-270

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

B. Zhang, C. Tang, P. Yang and J. Chen, Mater. Horiz., 2024, 11, 262 DOI: 10.1039/D3MH00635B

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