Spin and Orbital Rashba response in ferroelectric polarized PtSe${}_2$/MoSe${}_2$/LiNbO${}_3$ heterostructures

Abstract

Recent studies using Terahertz Time-Domain Spectroscopy (THz-TDS) with spintronic emitters as a source have revealed distinct signatures of the Rashba effect. This effect, which arises from the breaking of inversion symmetry in low-dimensional materials, has been recently investigated in CoFeB/PtSe${}_2$/MoSe${}_2$/LiNbO${}_3$-based heterostructures [S. Massabeau et al., APL Mater. 13, 041102, 2025 ]. The observed phenomena are at the source of the generated THz far-field emission, typically through mechanisms such as spin-to-charge conversion triggered by the absorption of ultrafast optical pulses. In this work, we employ first-principles simulations to quantify the Rashba effect at PtSe${}_2$/MoSe${}_2$/LiNbO${}_3$ interfaces, expanding the traditional understanding of spin transport by incorporating the orbital degree of freedom. Moreover, we quantify the degree of control on the THz emission depending on the polarization direction of LiNbO${}_3$. In order to achieve this, we analyze the accumulation of both spin and orbital components using linear response theory, revealing distinct behaviors. These findings are crucial for a deeper understanding of the physical processes governing angular momentum-to-charge conversion and THz emission. Moreover, they may provide broader insights into various experimental outcomes, including those related to spin-orbit torque.

References in corpus (31)

• The SIESTA method for ab initio order-N materials simulation
• Efficient index handling of multidimensional periodic boundary conditions
• Enhanced Gilbert Damping in Thin Ferromagnetic Films
• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Efficient metallic spintronic emitters of ultrabroadband terahertz radiation
• Spin Pumping and Inverse Spin Hall Effect in Platinum: The Essential Role of Spin-Memory Loss at Metallic Interfaces
• Intrinsic Spin and Orbital Hall Effects from Orbital Texture
• Spin battery operated by ferromagnetic resonance
• Spin pumping and spin-transfer torques in antiferromagnets
• Observation of the orbital Hall effect in a light metal Ti
• Trivial and inverted Dirac bands, and emergence of quantum spin Hall states in graphene on transition-metal dichalcogenides
• Inverse Edelstein Effect
• Ultrabroadband single-cycle terahertz pulses with peak fields of 300 kV cm${}^{-1}$ from a metallic spintronic emitter
• Theory of Current-Induced Angular Momentum Transfer Dynamics in Spin-Orbit Coupled Systems
• Disentangling orbital and valley Hall effects in bilayers of transition metal dichalcogenides
• Orbital Rashba effect in surface oxidized Cu film
• Induced spin-orbit coupling in twisted graphene-TMDC heterobilayers: twistronics meets spintronics
• Spin and orbital Edelstein effect in an oxide two-dimensional electron gas: theory and application to AlO${}_x$/SrTiO${}_3$
• Ultrafast spin-currents and charge conversion at 3d-5d interfaces probed by time-domain terahertz spectroscopy
• Direct visualization of Rashba-split bands and spin/orbital-charge interconversion at KTaO${}_3$ interfaces
• Antiferromagnetic order in epitaxial FeSe films on SrTiO3
• A new decomposition of the Kubo-Bastin formula
• Orbital Hall physics in two-dimensional Dirac materials
• Ultrafast spin-charge conversion at SnBi${}_2$Te${}_4$/Co topological insulator interfaces probed by terahertz emission spectroscopy
• Large Chiral Orbital Texture and Orbital Edelstein Effect in Co/Al Heterostructure
• Spin-orbit-coupling induced torque in ballistic domain walls: equivalence of charge-pumping and nonequilibrium magnetization formalisms
• Giant and anisotropic enhancement of spin-charge conversion in double Rashba interface graphene-based quantum system
• Inverse Rashba-Edelstein THz emission modulation induced by ferroelectricity in CoFeB/PtSe2/MoSe2//LiNbO3 systems
• Theory of spin and orbital charge conversion at the surface states of Bi_{1-x}Sb_x topological insulator
• Anatomy of torques from orbital Rashba textures: the case of Co/Al interfaces
• Terahertz time-domain signatures of the inverse Edelstein effect in topological-insulator|ferromagnet heterostructures