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arXiv · 2004.00800

Tunable and Enhanced Rashba Spin-Orbit Coupling in Iridate-Manganite Heterostructures

T. S. Suraj·Ganesh Ji Omar·Hariom Jani·Muhammad Mangattuchali Juvaid·Sonu Hooda·Anindita Chaudhuri·Andrivo Rusydi·Kanikrishnan Sethupathi·Thirumalai Venkatesan·Ariando Ariando·Mamidanna Sri Ramachandra Rao
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Abstract

Tailoring spin-orbit interactions and Coulomb repulsion are the key features to observe exotic physical phenomena such as magnetic anisotropy and topological spin texture at oxide interfaces. Our study proposes a novel platform for engineering the magnetism and spin-orbit coupling at LaMnO3/SrIrO3 (3d-5d oxide) interfaces by tuning the LaMnO3 growth conditions which controls the lattice displacement and spin-correlated interfacial coupling through charge transfer. We report on a tunable and enhanced interface-induced Rashba spin-orbit coupling and Elliot-Yafet spin relaxation mechanism in LaMnO3/SrIrO3 bilayer with change in the underlying magnetic order of LaMnO3. We also observed enhanced spin-orbit coupling strength in LaMnO3/SrIrO3 compared to previously reported SrIrO3 layers. The X-Ray spectroscopy measurement reveals the quantitative valence of Mn and their impact on charge transfer. Further, we performed angle-dependent magnetoresistance measurements, which show signatures of magnetic proximity effect in SrIrO3 while reflecting the magnetic order of LaMnO3. Our work thus demonstrates a new route to engineer the interface induced Rashba spin-orbit coupling and magnetic proximity effect in 3d-5d oxide interfaces which makes SrIrO3 an ideal candidate for spintronics applications.

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T. S. Suraj, Ganesh Ji Omar, Hariom Jani, Muhammad Mangattuchali Juvaid, Sonu Hooda, Anindita Chaudhuri, Andrivo Rusydi, Kanikrishnan Sethupathi, Thirumalai Venkatesan, Ariando Ariando, Mamidanna Sri Ramachandra Rao. 2020-04-02. Tunable and Enhanced Rashba Spin-Orbit Coupling in Iridate-Manganite Heterostructures. https://doi.org/10.1103/physrevb.102.125145

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