Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 70: Gerhard Ertl Young Investigator Award
O 70.2: Vortrag
Donnerstag, 17. März 2011, 11:45–12:15, WIL C307
Manipulation of the spin structure of metallic QWS and topological insulators. — •Hugo Dil1,2, Fabian Meier1,2, Bartosz Slomski1,2, and Juerg Osterwalder1 — 1Physik-Institut, Universitat Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland — 2Swiss Light Source, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
The electronic structure of non-magnetic low-dimensional materials can acquire a spin structure due to the breaking of the inversion symmetry at the surface or interface. This so-called Rashba effect is a prime candidate for the manipulation of the electron spin without using any magnetic fields. This is crucial for the emerging field of spintronics, where the spin of the electron instead of its charge is used to transport or store information. Spin and angle resolved photoemission is currently one of the main experimental methods to measure the spin resolved electronic structure, which contains all the relevant information for spintronics [1]. Here it will be shown how the knowledge obtained from model Rashba systems can be applied to increasingly complex systems and result in the possibility to manipulate the spin structure of ultrathin Pb films [1] and topological insulators [3].
[1] For a review see: J. Hugo Dil, J. Phys.: Condens. Matter 21 403001 (2009). [2] H. Dil et al. Phys. Rev. Lett. 101, 266802 (2008). [3] D. Hsieh et al. Nature 460, 1101 (2009).