V2O3(0001) surface terminations: from oxygen- to vanadium-rich
(2004) In Surface Science 555(1-3). p.101-117- Abstract
- Well-ordered epitaxial V2O3(0 0 0 1) films (thickness > 80 Angstrom) have been prepared on the clean Rh(1 1 1) surface and investigated with scanning tunnelling microscopy, low-energy electron diffraction, high-resolution electron energy loss spectroscopy and high-resolution X-ray photoelectron spectroscopy with synchrotron radiation. Atomically flat V2O3(0 0 0 1) surfaces, terminated by vanadyl (V=O) groups, have been obtained after the reactive oxide deposition and subsequent annealing in vacuum to 600 degreesC. Annealing the V=O termination in oxygen atmosphere (500 degreesC, 5 x 10(-6) mbar) results in the partial removal of the vanadyl groups and in the formation of an oxygen-richer surface termination, exhibiting a (root3 x... (More)
- Well-ordered epitaxial V2O3(0 0 0 1) films (thickness > 80 Angstrom) have been prepared on the clean Rh(1 1 1) surface and investigated with scanning tunnelling microscopy, low-energy electron diffraction, high-resolution electron energy loss spectroscopy and high-resolution X-ray photoelectron spectroscopy with synchrotron radiation. Atomically flat V2O3(0 0 0 1) surfaces, terminated by vanadyl (V=O) groups, have been obtained after the reactive oxide deposition and subsequent annealing in vacuum to 600 degreesC. Annealing the V=O termination in oxygen atmosphere (500 degreesC, 5 x 10(-6) mbar) results in the partial removal of the vanadyl groups and in the formation of an oxygen-richer surface termination, exhibiting a (root3 x root3)R30degrees structure. Structure models for this oxygen-rich termination are proposed, which are characterised by (O=V)(0.66)-O-3-V-V-. . . and (O=V)(0.33)-O-3-V-V (. . .) stacking sequences. Conversely, deposition of sub-monolayer V coverages onto the V=O surface leads to the formation of a metal-rich V2O3(0 0 0 1) surface, terminated by a close-packed V-3 layer on top of the bulk-type O-3 plane. Such a VO(1 1 1)-layer is only metastable and oxidises back readily upon annealing in vacuum to the vanadyl-terminated V2O3(0 0 0 1) surface. (C) 2004 Elsevier B.V. All rights reserved. (Less)
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https://lup.lub.lu.se/record/280592
- author
- Schoiswohl, J ; Sock, M ; Surnev, S ; Ramsey, MG ; Netzer, FP ; Kresse, G and Andersen, Jesper N LU
- organization
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- spectroscopy, X-ray photoelectron, vanadium oxide, scanning tunneling microscopy, electron energy loss spectroscopy (EELS)
- in
- Surface Science
- volume
- 555
- issue
- 1-3
- pages
- 101 - 117
- publisher
- Elsevier
- external identifiers
-
- wos:000220932600013
- scopus:1842527485
- ISSN
- 0039-6028
- DOI
- 10.1016/j.susc.2003.12.053
- language
- English
- LU publication?
- yes
- id
- 31f6a28c-4f1e-4dc7-9a7b-68afad1ba788 (old id 280592)
- date added to LUP
- 2016-04-01 16:53:33
- date last changed
- 2022-01-28 22:55:41
@article{31f6a28c-4f1e-4dc7-9a7b-68afad1ba788,
abstract = {{Well-ordered epitaxial V2O3(0 0 0 1) films (thickness > 80 Angstrom) have been prepared on the clean Rh(1 1 1) surface and investigated with scanning tunnelling microscopy, low-energy electron diffraction, high-resolution electron energy loss spectroscopy and high-resolution X-ray photoelectron spectroscopy with synchrotron radiation. Atomically flat V2O3(0 0 0 1) surfaces, terminated by vanadyl (V=O) groups, have been obtained after the reactive oxide deposition and subsequent annealing in vacuum to 600 degreesC. Annealing the V=O termination in oxygen atmosphere (500 degreesC, 5 x 10(-6) mbar) results in the partial removal of the vanadyl groups and in the formation of an oxygen-richer surface termination, exhibiting a (root3 x root3)R30degrees structure. Structure models for this oxygen-rich termination are proposed, which are characterised by (O=V)(0.66)-O-3-V-V-. . . and (O=V)(0.33)-O-3-V-V (. . .) stacking sequences. Conversely, deposition of sub-monolayer V coverages onto the V=O surface leads to the formation of a metal-rich V2O3(0 0 0 1) surface, terminated by a close-packed V-3 layer on top of the bulk-type O-3 plane. Such a VO(1 1 1)-layer is only metastable and oxidises back readily upon annealing in vacuum to the vanadyl-terminated V2O3(0 0 0 1) surface. (C) 2004 Elsevier B.V. All rights reserved.}},
author = {{Schoiswohl, J and Sock, M and Surnev, S and Ramsey, MG and Netzer, FP and Kresse, G and Andersen, Jesper N}},
issn = {{0039-6028}},
keywords = {{spectroscopy; X-ray photoelectron; vanadium oxide; scanning tunneling microscopy; electron energy loss spectroscopy (EELS)}},
language = {{eng}},
number = {{1-3}},
pages = {{101--117}},
publisher = {{Elsevier}},
series = {{Surface Science}},
title = {{V2O3(0001) surface terminations: from oxygen- to vanadium-rich}},
url = {{http://dx.doi.org/10.1016/j.susc.2003.12.053}},
doi = {{10.1016/j.susc.2003.12.053}},
volume = {{555}},
year = {{2004}},
}