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Título

Spin-flip transitions induced by time-dependent electric fields in surfaces with strong spin-orbit interaction

Autor Ibañez-Azpiroz, Julen; Eiguren, Asier; Sherman, E. Ya.; Bergara, Aitor
Fecha de publicación 2012
EditorAmerican Physical Society
Citación Physical Review Letters 109: 156401 (2012)
ResumenWe present a comprehensive theoretical investigation of the light absorption rate at a Pb/Ge(111)-β√3×√3R30° surface with strong spin-orbit coupling. Our calculations show that electron spin-flip transitions cause as much as 6% of the total light absorption, representing 1 order of magnitude enhancement over Rashba-like systems. Thus, we demonstrate that a substantial part of the light irradiating this nominally nonmagnetic surface is attenuated in spin-flip processes. Remarkably, the spin-flip transition probability is structured in well-defined hot spots within the Brillouin zone, where the electron spin experiences a sudden 90° rotation. This mechanism offers the possibility of an experimental approach to the spin-orbit phenomena by optical means. © 2012 American Physical Society.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevLett.109.156401
URI http://hdl.handle.net/10261/102081
DOI10.1103/PhysRevLett.109.156401
Identificadoresdoi: 10.1103/PhysRevLett.109.156401
issn: 0031-9007
e-issn: 1079-7114
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