Scanning tunneling spectroscopy permits real-space observation of one-dimensional electronic states on a Fe(100) surface alloyed with Si. These states are localized along chains of Fe-atoms in domain boundaries of the Fe(100) c(2x2)Si surface alloy, as confirmed by first-principles spin-polarized calculations. The calculated charge densities illustrate the d-like orbital character of the one-dimensional state and show its relationship to a two-dimensional state existing on the pure Fe(100) surface.
Part of this work is on display in the IAP/TU Wien STM Gallery (see the electron waves&orbitals page).
Corresponding author: M. Schmid (schmid).
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