Effects of impurities on Tamm-like lanthanide-metal surface states

Details Effects of impurities on Tamm-like lanthanide-metal surface states Effects of impurities on Tamm-like lanthanide-metal surface states

2007-08-17

arxiv.org/abs/0708.2306v1

Physics

Condensed Matter

Materials Science

5 pages, 4 figures, accepted as Brief Report for Physical Review B

Scientific paper

10.1103/PhysRevB.76.113410

The effects of isolated residual-gas adsorbates on the local electronic structure of the Dy(0001) surface were spatially mapped by scanning tunneling microscopy and spectroscopy at 12 K. Less than 15 A away from an adsorbate, a strong reduction of the intensity and a significant increase of the width of the majority component of the surface state due to impurity scattering were observed, with essentially no change of the minority component; this reflects a high lateral localization of the Tamm-like surface state. Furthermore, an adsorbate-induced state was found that behaves metastable.

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