Observation of long-range orbital transport and giant orbital torque

Abstract

The generation of spin-current is integral for the successful development of spintronic devices however the orbital counterpart is also expected to be potentially advantageous. Here, using Ni/Ti bilayers, in combination with tight binding calculations, the authors investigate the spin torque efficiency that occurs as a result of the orbital Hall effect, observing that orbital currents can propagate over longer distances than the spin currents.