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Spin-flip transitions and departure from the Rashba model in the Au(111) surface

AutorIbañez-Azpiroz, Julen; Bergara, Aitor ; Sherman, E. Ya.; Eiguren, Asier
Fecha de publicación2013
EditorAmerican Physical Society
CitaciónPhysical Review B 88: 125404 (2013)
ResumenWe present a detailed analysis of the spin-flip excitations induced by a periodic time-dependent electric field in the Rashba prototype Au(111) noble metal surface. Our calculations incorporate the full spinor structure of the spin-split surface states and employ a Wannier-based scheme for the spin-flip matrix elements. We find that the spin-flip excitations associated with the surface states exhibit an strong dependence on the electron momentum magnitude, a feature that is absent in the standard Rashba model. Furthermore, we demonstrate that the maximum of the calculated spin-flip absorption rate is about twice the model prediction. These results show that, although the Rashba model accurately describes the spectrum and spin polarization, it does not fully account for the dynamical properties of the surface states. © 2013 American Physical Society.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevB.88.125404
URIhttp://hdl.handle.net/10261/102454
DOI10.1103/PhysRevB.88.125404
Identificadoresdoi: 10.1103/PhysRevB.88.125404
issn: 1098-0121
e-issn: 1550-235X
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