Berlin 2005 – wissenschaftliches Programm

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O: Oberflächenphysik

O 36: Postersitzung (Elektronische Struktur, Grenzfl
äche fest-flüssig, Halbleiteroberfl
ächen und -grenzfl
ächen, Nanostrukturen, Oberfl
ächenreaktionen, Teilchen und Cluster, Struktur und Dynamik reiner Oberfl
ächen)

O 36.57: Poster

Montag, 7. März 2005, 15:00–18:00, Poster TU F

Quantum confinement of surface-state electrons in atomic-scale nanostructures — •L. Niebergall, V.S. Stepanyuk, and P. Bruno — Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany

Performing the state of art ab initio calculations, we study the quantum confinement of surface-state electrons in atomic-scale nanostructures on metal surfaces. Quantum corrals on Cu(111) and fcc Co/Cu(111) are considered. We predict that the spin-polarization of surface state-electrons caused by magnetic adatoms can be projected to a remote location exploiting the quantum confinement of surface-state electrons in corrals. The long-range exchange interaction between magnetic adatoms in quantum corrals is revealed. The possibility of tailoring this interaction at large distances by the confined surface-state electrons is demonstrated. We show that the spin-polarization of surface-state electrons on Co/Cu(111)[1] could be manipulated constructing atomic-scale nanostructures on this substrate.

[1] L. Diekhöner, A.M. Schneider, A.N. Baranov, V.S. Stepanyuk, P. Bruno, and K. Kern, Phys. Rev.Lett. 90, 236801, (2003)