Comparison of the electronic structure and surface geometry of the metastable Cs+O overlayers on Ru(0001)

Y. D. Kim, Y. J. Zhu, S. Wendt, A. P. Seitsonen, S. Schwegmann, H. Bludau, H. Over, A. Morgante, and K. Christmann
Phys. Rev. B 61, 8455 – Published 15 March 2000
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Abstract

The postadsorption of 0.25 monolayer of Cs on oxygen-precovered Ru(0001) surfaces with various coverages ranging from 0.25 to 1 results in the formation of metastable O+Cs overlayers. These systems are characterized by only minor changes of the electronic and structural characteristics of the Cs subsystems, due to the presence of coadsorbed oxygen. This indicates a quite weak interaction between the two subsystems as judged from thermal desorption spectroscopy, metastable deexcitation spectroscopy, low-energy electron diffraction measurements, and density-functional theory calculations. The main reason for the development of such metastable phases is seen in the strong O-Ru bonding which is superior to the Cs-O interaction.

  • Received 30 August 1999

DOI:https://doi.org/10.1103/PhysRevB.61.8455

©2000 American Physical Society

Authors & Affiliations

Y. D. Kim, Y. J. Zhu, S. Wendt, A. P. Seitsonen, S. Schwegmann, H. Bludau, and H. Over*

  • Department of Physical Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany

A. Morgante

  • Dipartimento di Fisica, Università di Trieste, Via Valerio 2, I-34127 Trieste, Italy
  • TASC-INFM Laboratory, Padriciano 99, I-34012 Trieste, Italy

K. Christmann

  • Department of Physical Chemistry, Free University of Berlin, Takustrasse 3, D-Berlin, Germany

  • *FAX: ++49-30-84135106. Electronic address: over@fhi-berlin.mpg.de http://w3.rz-berlin;mpg.de/pc/leed/

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Vol. 61, Iss. 12 — 15 March 2000

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