Dresden 2009 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 57: Focused Session: Spin-Orbit Interaction at Surfafces: From the Rashba Effect to Topological States of Matter II

O 57.9: Vortrag

Donnerstag, 26. März 2009, 18:00–18:15, HSZ 02

Spin-orbit coupling effect on surface state ripples — •Samir Lounis, Andreas Bringer, and Stefan Blügel — Institut für Festkörperforschung and Institut for Advanced Simulation, Forschungszentrum Jülich, D-52425 Jülich, Germany

Surfaces are an inversion asymmetric environment. In combination with the spin-orbit interaction, surface electrons experience a Rashba effect, which leads to spin-split surface states. Having an adatom on such a surface, surface states scatter at it. Interferences are created from which, surprisingly, the fingerprints of spin-orbit coupling cannot be seen with a scanning tunneling microscope (STM) [3]. Instead of a single adatom, Walls and Heller [4] proposed to use a corral of atoms to create extra spin-orbit coupling related modulations in the charge density. Resting on multiple scattering theory, we propose a different suggestion to visualize such effects using STM considering either a single adatom or a corral of adatoms.

This work is supported by the ESF EUROCORES Programme SONS under contract N. ERAS-CT-2003-980409 and the DFG Priority Programme SPP1153.

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[2] Yu. M. Koroteev, G. Bihlmayer, J.E. Gayone, E.V. Chulkov, S. Blügel, P.M. Echenique, Ph. Hofmann, Phys. Rev. Lett. 93, 046403 (2004).

[3] L. Petersen and P. Hedegård, Surf. Sci. 49, 459 (2000).

[4] J.D. Walls and E.J. Heller, Nano Letters 7, 3377 (2007).