The interplay between the surface band structure and possible surface reconstructions of Mo(112)

Authors

T. McAvoy, University of Nebraska-Lincoln
Jun Zhang, University of Nebraska-LincolnFollow
C. Waldfried, University of Nebraska-Lincoln
D.N. McIlroy, University of Nebraska-Lincoln
Peter A. Dowben, University of Nebraska-LincolnFollow
O. Zeybek, University of Liverpool, Liverpool L69-3BX, UK
T. Bertrams, University of Liverpool, Liverpool L69-3BX, UK
S.D. Barrett, University of Liverpool, Liverpool L69-3BX, UK

Date of this Version

April 2000

Comments

Published in The European Physical Journal B 14 (2000), pp. 747–755. Copyright © 2000 Società Italiana di Fisica / EDP Sciences / Springer-Verlag. Used by permission. http://www.edpsciences.org/journal/index.cfm?edpsname=epjb.

Abstract

The experimental band structure of Mo(112) and the effects by temperature and adsorbate are presented. A surface resonance, identified as crossing the Fermi level at about 1/3 from Γ̅ to Χ̅ of surface Brillouin zone, was observed to be very sensitive to both contamination and temperature. We find evidence of adsorbate and temperature induced reconstruction of the Mo(112) surface. Examination of low-energy electron diffraction (LEED) and scanning tunneling microscopy (STM) data provides evidence for an adsorbate induced reconstruction of the Mo(112) surface with periodicities consistent with the Fermi level crossingThe experimental band structure of Mo(112) and the effects by temperature and adsorbate are presented. A surface resonance, identified as crossing the Fermi level at about 1/3 from Γ̅ to Χ̅ of surface Brillouin zone, was observed to be very sensitive to both contamination and temperature. We find evidence of adsorbate and temperature induced reconstruction of the Mo(112) surface. Examination of low-energy electron diffraction (LEED) and scanning tunneling microscopy (STM) data provides evidence for an adsorbate induced reconstruction of the Mo(112) surface with periodicities consistent with the Fermi level crossing of the surface resonance. The reconstruction is found to occur at coverages as low as 0.03 Langmuirs of oxygen or carbon. The reconstruction and/or adsorbate affects the density of states and bands near the Fermi level of a₁ symmetry. of the surface resonance. The reconstruction is found to occur at coverages as low as 0.03 Langmuirs of oxygen or carbon. The reconstruction and/or adsorbate affects the density of states and bands near the Fermi level of a₁ symmetry.