Optically-Controlled Orbitronics on a Triangular Lattice

Abstract

The propagation of electrons in an orbital multiplet dispersing on a lattice can support anomalous transport phenomena deriving from an orbitally-induced Berry curvature. In striking contrast to the related situation in graphene, we find that anomalous transport for an $L=1$ multiplet on the primitive 2D triangular lattice is activated by easily implemented on-site and optically-tunable potentials. We demonstrate this for dynamics in a Bloch band where point degeneracies carrying opposite winding numbers are generically offset in energy, allowing both an anomalous charge Hall conductance with sign selected by off-resonance coupling to circularly-polarized light and a related anomalous orbital Hall conductance activated by layer buckling.

arXiv comment5 + 4 pages, 4 + 1 figures, version accepted to Physical Review Letters

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Cited by in corpus (31)

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• Orbitronics: Orbital Currents in Solids
• Disentangling orbital and valley Hall effects in bilayers of transition metal dichalcogenides
• Orbital Hall effect as an alternative to valley Hall effect in gapped graphene
• Intrinsic orbital moment and prediction of a large orbital Hall effect in the 2D transition metal dichalcogenides
• Orbital Hall Insulating Phase in Transition Metal Dichalcogenide Monolayers
• Chirality as Generalized Spin-Orbit Interaction in Spintronics
• Revealing Hidden Orbital Pseudospin Texture with Time-Reversal Dichroism in Photoelectron Angular Distributions
• 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
• Pure Bulk Orbital and Spin Photocurrent in Two-Dimensional Ferroelectric Materials
• Two-dimensional orbital Hall insulators
• Topological pumping in a Floquet-Bloch band
• Orbital magnetoelectric effect in zigzag nanoribbons of p-band systems
• Conserved current of nonconserved quantities
• Orbital magnetoelectric effect in nanoribbons of transition metal dichalcogenides
• Why the first magic-angle is different from others in twisted graphene bilayers: interlayer currents, kinetic and confinement energy and wavefunction localization
• Orbitronics in Two-dimensional Materials
• Orbital Hall effect in mesoscopic devices
• Ultrathin films of black phosphorus as suitable platforms for unambiguous observation of the orbital Hall effect
• Controlling the orbital Hall effect in gapped bilayer graphene in the terahertz regime
• Evidence of Ultrashort Orbital Transport in Heavy Metals Revealed by Terahertz Emission Spectroscopy
• Detection of the Orbital Hall Effect by the Orbital-Spin Conversion
• Spin and orbital Edelstein effect in spin-orbit coupled noncentrosymmetric superconductor
• Universal intrinsic orbital dynamics from Berry curvature in electronic two-band systems
• Orbital Hall Conductivity in a Graphene/Haldane and Haldane/Haldane Bilayers
• Coherence Control of Directional Nonlinear Photocurrent in Spatially Symmetric Systems
• Repulsion driven metallic phase in the ground state of the half-filled $t-t^{\prime }$ ionic Hubbard chain
• The large $|U|$ expansion for a half-filled asymmetric Hubbard model on a triangular ladder in the presence of spin-dependent magnetic flux
• Comparing the Extrinsic Orbital Hall Effect in Centrosymmetric and Noncentrosymmetric Systems: Insights from Bilayer Transition Metal Dichalcogenides
• Orbital Dynamics in Centrosymmetric Systems