Direct observation of surface chemical order by scanning tunneling microscopy

M. Schmid, H. Stadler, and P. Varga
Phys. Rev. Lett. 70, 1441 – Published 8 March 1993
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Abstract

We present the first scanning tunneling microscopy (STM) study which allows clear discrimination of two chemical species in a metal alloy. Special tunneling conditions, which we attribute to an adsorbate at the STM tip, cause a difference in corrugation between Pt and Ni atoms of 0.3 Å. The STM data reveal chemical short-range order at the surface, which is in agreement with embedded atom simulations and can be understood as small domains of an L10 ordered phase.

  • Received 4 August 1992

DOI:https://doi.org/10.1103/PhysRevLett.70.1441

©1993 American Physical Society

Authors & Affiliations

M. Schmid, H. Stadler, and P. Varga

  • Institut für Allgemeine Physik, Technische Universität Wien, A-1040 Wien, Austria

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Issue

Vol. 70, Iss. 10 — 8 March 1993

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