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(0 0 1) V surface structures analysed by RHEED and STM
Surface science, 2001-02, Vol.473 (3), p.172-182
[Peer Reviewed Journal]
2001 Elsevier Science B.V. ;2001 INIST-CNRS ;ISSN: 0039-6028 ;EISSN: 1879-2758 ;DOI: 10.1016/S0039-6028(00)00972-9 ;CODEN: SUSCAS
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Title:
(0 0 1) V surface structures analysed by RHEED and STM
Author:
Dulot, F.
;
Turban, P.
;
Kierren, B.
;
Eugène, J.
;
Alnot, M.
;
Andrieu, S.
Subjects:
Applied sciences
;
Auger electron spectroscopy
;
Condensed matter: structure, mechanical and thermal properties
;
Electron diffraction and scattering
;
Electron, ion, and scanning probe microscopy
;
Exact sciences and technology
;
Low-energy electron diffraction (leed) and reflection high-energy electron diffraction (rheed)
;
Metals. Metallurgy
;
Physics
;
Reflection high-energy electron diffraction (RHEED)
;
Scanning probe microscopy: scanning tunneling, atomic force, scanning optical, magnetic force, etc
;
Scanning tunnelling microscopy
;
Solid surfaces and solid-solid interfaces
;
Structure of solids and liquids
;
crystallography
;
Surface relaxation and reconstruction
;
Surface structure and topography
;
Surfaces and interfaces
;
thin films and whiskers (structure and nonelectronic properties)
;
Vanadium
Is Part Of:
Surface science, 2001-02, Vol.473 (3), p.172-182
Description:
In this paper, the single-crystalline (0 0 1) V surface is studied by electron diffraction, Auger spectroscopy, and scanning tunnelling microscopy (STM). (1×1), (5×5) (and sometimes 6×6) surface atomic arrangement are observed in correlation with the oxygen surface concentration. For less than 0.15 ml of oxygen, no reconstruction is detected. The (5×5) surface structure is observed for an oxygen coverage in the range 0.15–1.2 ml. However, a pseudo-(1×1) surface structure can also be observed near 1 ml of oxygen. The STM analysis demonstrates that the (5×5) reconstruction results in fact from a mixing of (5×1) and (1×5) domains. At the atomic scale, the images show that the electronic density is modified over two parallel atomic lines every five but also six atomic distances. For the pseudo-(1×1) reconstructed surface, these lines are still present, but, depending on the density of vacancies, (6×1) up to (12×1) periodicities can be observed locally. We find that the periodicity linearly increases with the number of vacancies. The extension of this linear dependence up to the lack of vacancies leads to the (5×1) periodicity. These surface reconstructions lead to unusual reflection high-energy electron diffraction (RHEED) patterns, that are perfectly explained by the surface morphology. Finally, RHEED measurement of the in-plane lattice parameter allows us to demonstrate that the (5×5) reconstructed surface is compressed. This behaviour allows us to propose a model for the (0 0 1) V surface reconstructions induced by oxygen.
Publisher:
Lausanne: Elsevier B.V
Language:
English
Identifier:
ISSN: 0039-6028
EISSN: 1879-2758
DOI: 10.1016/S0039-6028(00)00972-9
CODEN: SUSCAS
Source:
Alma/SFX Local Collection
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