Abstract
The Fermi and Rashba energies of surface states in the alloy can be tuned simultaneously by changing the composition parameter . We report on unconventional Fermi surface spin textures observed by spin and angle-resolved photoemission spectroscopy that are correlated with a topological transition of the Fermi surface occurring at . We show that the surface states remain fully spin polarized upon alloying and that the spin-polarization vectors are approximately tangential to the constant energy contours. We discuss the implications of the topological transition for the transport of spin.
- Received 27 February 2009
DOI:https://doi.org/10.1103/PhysRevB.79.241408
©2009 American Physical Society