Ab initio study of mirages and magnetic interactions in quantum corrals

Details Ab initio study of mirages and magnetic interactions in quantum corrals Ab initio study of mirages and magnetic interactions in quantum corrals

2005-02-21

arxiv.org/abs/cond-mat/0502506v1

Physics

Condensed Matter

Materials Science

Submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.94.187201

The state of the art ab initio calculations of quantum mirages,the spin-polarization of surface-state electrons and the exchange interaction between magnetic adatoms in Cu and Co corrals on Cu(111) are presented. We find that the spin-polarization of the surface-state electrons caused by magnetic adatoms can be projected to a remote location and can be strongly enhanced in corrals compared to an open surface.Our studies give a clear evidence that quantum corrals could permit to tailor the exchange interaction between magnetic adatoms at large separations. The spin-polarization of surface-state electrons at the empty focus in the Co corral used in the experimental setup of Manoharan et al., (Nature 403, 512 (2000)) is revealed.

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