Spatiotemporally Resolved Orbital Hall Effect in a Topological Semimetal.

ABSTRACT: Orbital angular momentum (OAM), once considered a marginal property in solids, has recently gained importance in various physical phenomena. Although optical probes couple to OAM directly, comparable low-energy electrodynamic methods are still in the early stages of development. To exploit the potential of OAM for information science and technology, angular momentum-resolved transport methods must be established. Here, a principle is presented for an angular momentum-resolved method to observe orbital Hall effect (OHE) in real space. The orbital conduction in the topological semimetal T_d-WTe₂ is measured using contact-free polarimetric terahertz probe, showing that two distinct regions of ±L_z with a diffusion length of ≈130 µm due to the extremely low scatt

SUBMITTER: Park BC 

PROVIDER: S-EPMC12810624 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature