Surface structure and composition of the missing-row reconstruction of VC0.8(1 1 0): A LEED, GIXRD and photoemission study

Gauthier, Y.Institut Néel, UPR 2940 - CNRS, 25 av. des Martyrs, 38042 Grenoble, France (författare)

Surface structure and composition of the missing-row reconstruction of VC0.8(1 1 0) : A LEED, GIXRD and photoemission study

Low energy electron diffraction, grazing incidence X-ray diffraction and photoemission were used to decipher the detailed structural arrangement and chemical composition of the surface region of a transition metal carbide, VC0.8(1 1 0). In agreement with previous scanning tunneling microscopy (STM) studies, we find that the surface reconstructs with a ridge-and-valley grating structure along the [1 over(1, ¯) 0] direction resulting from {0 0 1} faceting for the (3 × 1) and the (4 × 1) phases. Both superstructures terminate on the vacuum side with a nearly stoïchiometric VC region due to C segregation, in contrast with the conclusions drawn from this previous STM study. However, the present experiments clearly show that these phases are metastable, and slow cooling results in a (1 × 1) surface, which is highly C depleted, similarly to the (1 0 0) face. © 2007 Elsevier B.V. All rights reserved.

Zasada, I.Solid State Physics Department, University of Lodz, ul. Pomorska 149/153, 90-236 Lodz, Poland (författare)
De, Santis M.De Santis, M., Institut Néel, UPR 2940 - CNRS, 25 av. des Martyrs, 38042 Grenoble, France (författare)
Langlais, V.Institut Néel, UPR 2940 - CNRS, 25 av. des Martyrs, 38042 Grenoble, France, Universitat Autonoma de Barcelona, Departamento de Fisica, 08193 Bellaterra, Barcelona, Spain (författare)
Virojanadara, ChariyaLinköpings universitet,Halvledarmaterial,Tekniska högskolan(Swepub:liu)chavi32 (författare)
Johansson, LeifLinköpings universitet,Halvledarmaterial,Tekniska högskolan(Swepub:liu)leijo19 (författare)
Institut Néel, UPR 2940 - CNRS, 25 av. des Martyrs, 38042 Grenoble, FranceSolid State Physics Department, University of Lodz, ul. Pomorska 149/153, 90-236 Lodz, Poland (creator_code:org_t)

Av författaren/redakt...: Gauthier, Y.; Zasada, I.; De, Santis M.; Langlais, V.; Virojanadara, Ch ...; Johansson, Leif

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