2025/07/01 by Egor I. Kiselev, Kiselev, Egor I., Benoît Douçot +3
Materials Science · Physics and Astronomy · #Angular momentum #Dynamics (music) #Electron #FOS: Physical sciences #Hall effect #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Metamaterials and Metasurfaces Applications #Momentum (technical analysis) #Orbital Angular Momentum in Optics #Orbital motion #Scaling #Scattering #Topological Materials and Phenomena
paper · pdf · doi:10.48550/arxiv.2507.00982
published in arXiv (Cornell University) (Cornell University)
openalex publication_date 2025/07/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present an analysis of the orbital Hall effect (OHE) in a strip geometry and derive a formula for the orbital angular momentum (OAM) accumulation at the edges. The result is expressed in terms of band structure parameters and scattering rates, providing a link between experimental observations of the OHE and the underlying microscopics. A key result is that the effective OAM decay rate follows a Dykonov-Perel-like scaling and is inversely proportional to the electron scattering rate, even if the latter is small. Furthermore, investigating OAM transport in an inhomogeneous setting, we show that non-Ohmic flows and spatially varying electric fields result in contributions to the OHE which are distinct from the well known intrinsic and extrinsic mechanisms.