Intrinsic Orbital Hall Effect in Degenerate Spin-3/2 Systems driven by the quantum metric
The study investigates how orbital Hall effects arise in rotationally invariant spin-3/2 systems. It finds that these effects stem from interband matrix elements of the orbital magnetic moment, not Berry curvature. The resulting transport is governed by the quantum metric, revealing a purely geometric mechanism for orbital Hall response in degenerate multiband systems.