Scanning tunneling spectroscopy of one-dimensional surface states on a metal surface

A. Biedermann, O. Genser, W. Hebenstreit, M. Schmid, J. Redinger*, R. Podloucky+, and P. Varga

Institut für Allgemeine Physik, Technische Universität Wien, A-1040 Wien, Austria
*Institut für Technische Elektrochemie, Technische Universität Wien, A-1060 Wien, Austria
+Institut für Physikalische Chemie, Universität Wien, A-1090 Wien, Austria

Phys. Rev. Lett. 76 (1996) 4179-4182

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< encoded email address >).

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