Stepanyuk V S, Niebergall L, Hergert W, Bruno P
Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany.
Phys Rev Lett. 2005 May 13;94(18):187201. doi: 10.1103/PhysRevLett.94.187201. Epub 2005 May 11.
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 clear evidence that quantum corrals could permit one to tailor the exchange interaction between magnetic adatoms at large separations.
本文介绍了对量子海市蜃楼、表面态电子的自旋极化以及铜（111）上铜和钴围栏中磁性吸附原子之间交换相互作用的最新从头算计算。我们发现，由磁性吸附原子引起的表面态电子的自旋极化可以投射到一个远程位置，并且与开放表面相比，在围栏中可以得到强烈增强。我们的研究提供了明确的证据，表明量子围栏可以使人们在大间距下定制磁性吸附原子之间的交换相互作用。
