Orbital Rashba effect in a surface-oxidized Cu film
作者： Stefan Blügel , Yuriy Mokrousov , Yuriy Mokrousov , Dongwook Go , Dongwook Go
DOI: 10.1103/PHYSREVB.103.L121113
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摘要: Recent experimental observation of an unexpectedly large current-induced spin-orbit torque in surface oxidized Cu on top of a ferromagnet pointed to a possibly prominent role of the orbital Rashba effect (ORE) in this system. Here, we use first principles methods to investigate the ORE in a system of oxygen monolayer deposited on top of a Cu (111) film. We show that surface oxidization of the Cu film leads to a gigantic enhancement of the ORE near the Fermi energy. The resulting chiral orbital texture in the momentum space is …
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