Regensburg 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 15: Spin-Orbit Interaction at Surfaces II
O 15.6: Vortrag
Montag, 22. März 2010, 16:15–16:30, H38
Quantum-size induced giant spin-orbit splitting — •Andreas Ruffing1, Stefan Mathias1,2, Martin Wiesenmayer3, Indranil Sarkar1, Gustav Biehlmayer4, Eugene V. Chulkov5,6, Yury M. Koroteev7, Pedro M. Echenique5,6, Michael Bauer3, and Martin Aeschlimann1 — 1Deepartment of Physics, University of Kaiserslautern, Germany — 2JILA and Department of Physics, University of Colorado, Boulder, USA — 3Institut für Experimentelle und Angewandte Physik, Universität Kiel, Germany — 4Institut für Festkörperforschung und Institut for Advanced Simulation, Forschungszentrum Jülich, Germany — 5Donostia International Physics Center (DIPC), San Sebastián/Donostia, Basque Country, Spain — 6Departamento de Física de Materiales and Centro Mixto CSIC-UPV/EHU, San Sebastian/Donostia, Basque Country, Spain — 7Institut of Strength Physics and Materials Science, RAS, Tomsk, Russia
We report on the observation of giant spin-orbit splitting of quantum-well states in the unoccupied electronic structure of a Bismuth monolayer on Cu(111). Up to now, Rashba-type splittings of this size have been reported exclusively for surface states in a partial bandgap. With these quantum-well states we have experimentally identified a second - and broader - class of states that show a huge spin-orbit splitting. First-principle electronic structure calculations show that the origin of the spin-orbit splitting is due to the perpendicular potential at the surface and interface of the ultrathin Bi film. This finding allows for the direct possibility to tailor spin-orbit splitting by means of thin film nanofabrication.