Orbital splitter effect and spatial resolution of current-induced orbital accumulation
arXiv:2503.08831 · doi:10.1103/pzt5-5ypz
Abstract
The emergence of an orbital angular momentum (OAM) response to a charge current holds promise for technological applications, allowing electrical control of magnetization dynamics. Often, the OAM current is invoked in explaining experimental results for very large orbital transport effects, but this is conceptually challenging as the OAM current is not a conserved quantity. Instead of utilizing the orbital conductivity associated with the non-conserved OAM current, we here use non-equilibrium Green's functions to directly image the OAM density in real space under an applied electric current bias. We find strong spatial variations in OAM density, with the lattice acting as a source and sink of OAM. Moreover, we show that the OAM response depends sensitively on the angle between the charge current and the crystal axis. This enables the generation of a transverse OAM response in one current direction and solely a longitudinal response in another. We refer to this as an orbital splitter effect, analogous to the spin splitter effect in altermagnets.
15 pages, 10 figures
References in corpus (53)
- Spin torque switching with the giant spin Hall effect of tantalum
- Spin Hall effect
- Universal Intrinsic Spin-Hall Effect
- Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
- Crystal Hall effect in Collinear Antiferromagnets
- Giant momentum-dependent spin splitting in centrosymmetric low Z antiferromagnets
- Efficient Electrical Spin-Splitter Based on Non-Relativistic Collinear Antiferromagnetism
- Momentum-Dependent Spin Splitting by Collinear Antiferromagnetic Ordering
- Intrinsic Spin and Orbital Hall Effects from Orbital Texture
- Observation of spin splitting torque in a collinear antiferromagnet RuO2
- Direct observation of altermagnetic band splitting in CrSb thin films
- On A Proper Definition of Spin Current
- Observation of spin-splitter torque in collinear antiferromagnetic RuO
- Observation of the orbital Hall effect in a light metal Ti
- Giant Orbital Hall Effect in Transition Metals: Origin of Large Spin and Anomalous Hall Effects
- Harnessing non-local orbital-to-spin conversion of interfacial orbital currents for efficient spin-orbit torques
- Gigantic intrinsic orbital Hall effects in weakly spin-orbit coupled metals
- Orbitronics: the Intrinsic Orbital Hall Effect in p-Doped Silicon
- Orbitronics: Orbital Currents in Solids
- Orbital-Angular-Momentum Based Origin of Rashba-Type Surface Band Splitting
- Orbital Torque: Torque Generation by Orbital Current Injection
- dc Josephson Effect in Altermagnets
- Observation of long-range orbital transport and giant orbital torque
- Magneto-Optical Detection of the Orbital Hall Effect in Chromium
- 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
- Imaging mesoscopic spin Hall flow: Spatial distribution of local spin currents and spin densities in and out of multiterminal spin-orbit coupled semiconductor nanostructures
- Two-dimensional altermagnets: Superconductivity in a minimal microscopic model
- Surface orbitronics: new twists from orbital Rashba physics
- Orbitally Dominated Rashba-Edelstein Effect in Noncentrosymmetric Antiferromagnets
- Minimal Models for Altermagnetism
- Detection of long-range orbital-Hall torques
- Role of Berry phase theory for describing orbital magnetism: From magnetic heterostructures to topological orbital ferromagnets
- Current-induced torques in the presence of spin-orbit coupling
- Mixing of - orbitals in 4d and 5d transition metal oxides
- Connecting Higher-Order Topology with the Orbital Hall Effect in Monolayers of Transition Metal Dichalcogenides
- Orbital Hall effect in bilayer transition metal dichalcogenides: From the intra-atomic approximation to the Bloch states orbital magnetic moment approach
- Intrinsic anomalous Hall effect in altermagnets
- Electrically Tunable Superconductivity Through Surface Orbital Polarization
- Microscopic mechanism for asymmetric charge distribution in Rashba-type surface states and the origin of the the energy splitting scale
- Unveiling Mechanisms of Electric Field Effects on Superconductors by Magnetic Field Response
- Orbital angular momentum of Bloch electrons: equilibrium formulation, magneto-electric phenomena, and the orbital Hall effect
- Orbital relaxation length from first-principles scattering calculations
- Orbital magnetoelectric effect in zigzag nanoribbons of p-band systems
- Giant efficiency of long-range orbital torque in Co/Nb bilayers
- Orbital Pumping Incorporating Both Orbital Angular Momentum and Position
- Orbital magnetoelectric effect in nanoribbons of transition metal dichalcogenides
- Orbital design of Berry curvature: pinch points and giant dipoles induced by crystal fields
- Symmetry constraints on the orbital transport in solids
- Intrinsic torque on the orbital angular momentum in an electric field
- High orbital-moment Cooper pairs by crystalline symmetry breaking
- Zero magnetic-field orbital vortices in s-wave spin-singlet superconductors
- Orbital currents in lattice multiorbital systems: Continuity equation, torques, and RKKY interaction