We present a detailed analysis of the band structure of the √3×√3 R 30 ∞ BiAg 2/Ag/Si(111) trilayer system by means of high resolution Angle Resolved Photoemission Spectroscopy (ARPES). BiAg 2/Ag/Si(111) exhibits a complex spin-polarized electronic structure due to giant spin-orbit interactions. We show that a complete set of constant energy ARPES maps, supplemented by a modified nearly free electron calculation, provides a unique insight into the structure of the spin-polarized bands and spin gaps. We also show that the complex gap structure can be continuously tuned in energy by a controlled deposition of an alkali metal. © 2012 American Physical Society.
Anisotropic spin gaps in BiAg 2-Ag/Si(111)
Crepaldi A.;
2012-01-01
Abstract
We present a detailed analysis of the band structure of the √3×√3 R 30 ∞ BiAg 2/Ag/Si(111) trilayer system by means of high resolution Angle Resolved Photoemission Spectroscopy (ARPES). BiAg 2/Ag/Si(111) exhibits a complex spin-polarized electronic structure due to giant spin-orbit interactions. We show that a complete set of constant energy ARPES maps, supplemented by a modified nearly free electron calculation, provides a unique insight into the structure of the spin-polarized bands and spin gaps. We also show that the complex gap structure can be continuously tuned in energy by a controlled deposition of an alkali metal. © 2012 American Physical Society.| File | Dimensione | Formato | |
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Crepaldi_PhysRevB.85.075411_Anisotropic spin gaps in BiAg2-Ag:Si(111).pdf
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