Switching between Spin and Orbital Hall Currents in a Single System via Ferrovalley Order.

Authors

Zhikuan Wang, Wei Tan, Bin Cui, Zeyu Jiang, Bing Huang

Published in

Physical review letters. Volume 137. Issue 14. Pages 146301. Oct 02, 2026.

Abstract

The spin Hall and orbital Hall effects are fundamental mechanisms for generating transverse spin and orbital currents. However, their intrinsic entanglement via spin-orbit coupling (SOC) has made the generation of pure spin or orbital Hall current a long-standing challenge. Here, we demonstrate a strategy not only to generate but also to reversibly switch between spin and orbital Hall currents within a single material. Combining first-principles calculations with tight-binding modeling, we show that spin-orbital-valley locking, together with external-field-controlled topological band inversion, enables a reversible crossover of Hall transport between spin- and orbital-dominated regimes, even yielding a dominant spin Hall response in weak-SOC systems. Our Letter provides a direct route toward disentangling mixed spin-orbital transport and establishes a versatile platform for the independent control and probing of spin and orbital degrees of freedom.

PMID:
42886941
Bibliographic data and abstract were imported from PubMed on 17 Oct 2026.

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