Intrinsic torque on the orbital angular momentum in an electric field

Abstract

Orbitronics harnesses non-equilibrium densities and flows of electrons orbital angular momentum (OAM). Although the OAM must be long lived to be useful in information processing, the mechanisms leading to OAM non-conservation remain unknown. Here we show that an electric field induces an intrinsic torque on the OAM mediated by the quantum metric tensor, without spin-orbit coupling or magnetic fields. The torque vanishes in pseudospin-1/2 systems with particle-hole symmetry but is nonzero in the presence of nontrivial textures. We discuss implications for topological materials and strategies for experimental observation.

References in corpus (31)

• Control of graphene's properties by reversible hydrogenation
• The Valley Hall Effect in MoS2 Transistors
• Orbital magnetization in periodic insulators
• On A Proper Definition of Spin Current
• Observation of the orbital Hall effect in a light metal Ti
• Quantum Theory of Orbital Magnetization and its Generalization to Interacting Systems
• Observation of long-range orbital transport and giant orbital torque
• Observation of the Orbital Rashba-Edelstein Magnetoresistance
• Magneto-Optical Detection of the Orbital Hall Effect in Chromium
• Theory of Current-Induced Angular Momentum Transfer Dynamics in Spin-Orbit Coupled Systems
• Current-induced Orbital and Spin Magnetizations in Crystals with Helical Structure
• Imaging Chern mosaic and Berry-curvature magnetism in magic-angle graphene
• Detection of long-range orbital-Hall torques
• Intrinsic orbital and spin Hall effects in monolayer transition metal dichalcogenides
• Gyrotropic Hall effect in Berry-curved materials
• Valley Zeeman effect and spin-valley polarized conductance in monolayer MoS${}_2$ in a perpendicular magnetic field
• Orbital Hanle Magnetoresistance in a 3d Transition Metal
• 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
• Quantum Kinetic Theory of the Chiral Anomaly
• Adiabatically Induced Orbital Magnetization
• Semiclassical equations of motion for disordered conductors: extrinsic interband velocity, corrected collision integral and spin-orbit torques
• Dominance of extrinsic scattering mechanisms in the orbital Hall effect: graphene, transition metal dichalcogenides and topological antiferromagnets
• Nonlocal topological valley transport at large valley Hall angles
• Orbital magnetoelectric effect in nanoribbons of transition metal dichalcogenides
• Room temperature magnetic phase transition in an electrically-tuned van der Waals ferromagnet
• Orbital magnetization of correlated electrons with arbitrary band topology
• Non-conservation of the valley density and its implications for the observation of the valley Hall effect
• Quantum theory of the Intrinsic Orbital Magnetoelectric Effect in itinerant electron systems at finite temperatures
• Spin transfer torques due to the bulk states of topological insulators
• Nonlinear magnetotransport in a two-dimensional system with merging Dirac points

Cited by in corpus (9)

• Orbitronics in Two-dimensional Materials
• Quantum correction to the orbital Hall effect
• Spin-Hall effect in topological materials: Evaluating the proper spin current in systems with arbitrary degeneracies
• Giant orbital Hall effect due to the bulk states of 3D topological insulators
• Nonlinear photomagnetization in insulators
• Orbital currents in lattice multiorbital systems: Continuity equation, torques, and RKKY interaction
• Theoretical study of orbital torque: Dependence on ferromagnet species and nonmagnetic layer thickness
• Orbital splitter effect and spatial resolution of current-induced orbital accumulation
• Orbital Hall effect in spin-3/2 hole-doped semiconductors and its implications for orbitronics