Spin polarized states and topological protection studied by spin-resolved ARPES
Mardi 13 novembre 2012 14h
Spin- and angle-resolved photoemission spectroscopy (SARPES) is a powerful technique to determine all the observable quantum numbers of an electron in a solid. The possibilities and challenges of this technique will be discussed by the example of Rashba systems and topological insulators. It will be shown how model Rashba systems are slowly approaching technological relevance and that it is now possible to envision a terahertz spin transistor. Furthermore the spin texture of topological insulators will be elucidated and it will be shown that a combination of (S)ARPES experiments in the UV and soft X-ray regime can give direct spectroscopic evidence of topological protection.