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Anisotropy of exchange interactions between impurities on Cu(110) surface

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, , Citation Eszter Simon et al 2010 J. Phys.: Conf. Ser. 200 032067 DOI 10.1088/1742-6596/200/3/032067

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1 Lóránd Eötvös University, Institute of Physics, H-1518 Budapest POB 32, Hungary

2 Research Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences, Konkoly-Thege M. út 29-33., H-1121 Budapest, Hungary

3 Department of Theoretical Physics, Budapest University of Technology and Economics, Budafoki út 8., H-1111 Budapest, Hungary

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1742-6596/200/3/032067

Abstract

We study the exchange interaction between two magnetic impurities on the (110) surface of Cu. We find that the interaction is oscillatory and decays as 1/d2 for large distances d of the impurities. We also show that the oscillations are governed by the Shockley-type surface state around the bar Y point of the Surface Brillouin zone. The asymmetry of the dispersion of this surface electronic band implies an anisotropic exchange interaction with respect to the relative position of the impurities.

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10.1088/1742-6596/200/3/032067