Lead-free Hybrid Perovskite: An Efficient Room Temperature Spin Generator via Large Interfacial Rashba effect

Abstract

Two-dimensional (2D) hybrid organic-inorganic perovskite (HOIP) demonstates great potential for developing flexible and wearable spintronic devices, by serving as spin sources via the bulk Rashba effect (BRE). However, the practical application of BRE in 2D HOIP faces huge challenges, particularly due to the toxicity of lead, which is crucial for achieving large spin-orbit coupling, and the restrictions in 2D HOIP candidates to meet specific symmetry-breaking requirements. To overcome these obstacles, we design a strategy to exploit the interfacial Rashba effect (IRE) of lead-free 2D HOIP (C6H5CH2CH2NH3)2CuCl4 (PEA-CuCl), manifesting as an efficient spin generator at room temperature. IRE of PEA-CuCl originates from the large orbital hybridization at the interface between PEA-CuCl and adjacent ferromagnetic layers. Spin-torque ferromagnetic resonance measurements further quantify a large Rashba effective field of 14.04 Oe per 10^11 A m-2, surpassing those of lead-based HOIP and traditional all-inorganic heterojunctions with noble metals. Our lead-free 2D HOIP PEA-CuCl, which harnesses large IRE for spin generation, is efficient, nontoxic, and economic, offering huge promise for future flexible and wearable spintronic devices.

References in corpus (24)

• Spin torque switching with the giant spin Hall effect of tantalum
• Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
• Spin Transfer Torque Generated by the Topological Insulator Bi_2Se_3
• Symmetry and magnitude of spin-orbit torques in ferromagnetic heterostructures
• Roadmap of spin-orbit torques
• Giant Rashba Splitting in CH3NH3PbBr3 Organic-Inorganic Perovskite
• Spin-orbit driven ferromagnetic resonance: A nanoscale magnetic characterisation technique
• Significant Dzyaloshinskii-Moriya Interaction at Graphene-Ferromagnet Interfaces due to Rashba-effect
• Angular and temperature dependence of current induced spin-orbit effective fields in Ta/CoFeB/MgO nanowires
• Comparison of spin-orbit torques and spin pumping across NiFe/Pt and NiFe/Cu/Pt interfaces
• Observation of the Orbital Rashba-Edelstein Magnetoresistance
• Spin-orbit torques in heavy metal/ferromagnet bilayers with varying strength of interfacial spin-orbit coupling
• Spin-split bands cause the indirect band gap of (CH${}_3$NH${}_3$)PbI${}_3$: Experimental evidence from circular photogalvanic effect
• Electrical manipulation of a ferromagnet by an antiferromagnet
• All electrical manipulation of magnetization dynamics in a ferromagnet by antiferromagnets with anisotropic spin Hall effects
• Room-temperature spin-orbit torque in NiMnSb
• Experimental Demonstration of the Co-existence of the Spin Hall and Rashba Effects in beta-Tantalum/Ferromagnet Bilayers
• Interfacial spin-orbit torque without bulk spin-orbit coupling
• Microscopic Theory of Rashba Interaction in Magnetic Metal
• Interface-driven spin-torque ferromagnetic resonance by Rashba coupling at the interface between non-magnetic materials
• Spin-Orbit Torques in Two-Dimensional Rashba Ferromagnets
• Disentangling relativistic spin torques in a ferromagnet/semiconductor bilayer
• Anomalous spin-orbit field via Rashba-Edelstein effect at W/Pt interface
• Substrate-induced spin-torque-like signal in spin-torque ferromagnetic resonance measurement