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Surface structure and composition of the missing-row reconstruction of VC0.8(1 1 0) : A LEED, GIXRD and photoemission study
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- Gauthier, Y. (author)
- Institut Néel, UPR 2940 - CNRS, 25 av. des Martyrs, 38042 Grenoble, France
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- Zasada, I. (author)
- Solid State Physics Department, University of Lodz, ul. Pomorska 149/153, 90-236 Lodz, Poland
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- De, Santis M. (author)
- De Santis, M., Institut Néel, UPR 2940 - CNRS, 25 av. des Martyrs, 38042 Grenoble, France
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- Institut Néel, UPR 2940 - CNRS, 25 av des Martyrs, 38042 Grenoble, France Solid State Physics Department, University of Lodz, ul. Pomorska 149/153, 90-236 Lodz, Poland (creator_code:org_t)
- Elsevier BV, 2007
- 2007
- English.
- In: Surface Science. - : Elsevier BV. - 0039-6028 .- 1879-2758. ; 601:16, s. 3383-3394
- Journal article (peer-reviewed)
Abstract
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- 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.
Keyword
- Carbide
- Low energy electron diffraction
- Photoemission
- Surface relaxation and reconstruction
- Surface segregation
- Surface X-ray diffraction
- Vacancy
- Vanadium
- TECHNOLOGY
- TEKNIKVETENSKAP
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Johansson, Leif
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- Linköping University
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