A. B. Zusammenfassung-einen-metall-isolator¨ubergangisolator¨-isolator¨ubergang-hervorruft, Zwei Modelle für die -V=O Oberflächengeometrie wurden diskutiert. Für jede Oberflächenterminierung wurde ein Elektronenenergieverlustspektrum (HREELS) gezeigt und mit einem Spektrum des isomorphischen Cr 2 O 3 verglichen, Wasseradsorptionsexperimente zeigen, dass Wasser sowohl molekular als auch dissoziativ auf beiden Oberflächen adsorbiert. Die Dissoziationswahrscheinlichkeit hängt von der Terminierung und von der Bedeckung ab

K. Heizen-dieser-spezies-auf-200 and . Zu-karbonatbildung, Die Adsorption von CO verhält sichähnlichsichähnlich wie die von CO 2 : nur kleine Menge adsorbieren auf der -V=O Oberfläche, während die -V Oberfläche viel reaktiver zu sein scheint. Winkelaufgelöste UPS Messungen deuten auf eine flache CO Adsorptionsgeometrie auf der -V=O Oberfläche hin. NEXAFund IRA-Spektren zeigen dagegen

R. Auf-au and Y. Casanova, W(110) im Hinblick auf ihre geometrische und elektronische Struktur charakterisiert werden. Zudem konnten grundlegende Experimente zur Adsorption durchgeführt werden, die maßgeblich für die weitere Forschung an diesem System sind, Barbaux. J. Electron Spectrosc. Rel. Phenom, vol.71, issue.111, pp.249-261, 1995.

B. Tepper, B. Richter, A. Dupuis, H. Kuhlenbeck, C. Hucho et al., Adsorption of molecular and atomic hydrogen on vacuum-cleaved V2O5(), Surface Science, vol.496, issue.1-2, pp.64-72, 2002.
DOI : 10.1016/S0039-6028(01)01607-7

I. V. Markov, Crystal growth for beginners : fundamentals of nucleation, crystal growth and epitaxy, World Scientific, 1995.

J. A. Venables, The Chemical Physics of Solid Surfaces Growth and properties of ultrathin epitaxial layers, pp.1-45, 1997.

P. A. Cox, Transition Metal Oxides : An Introduction to their Electronic Structure and Properties, 1992.

C. Noguera, Physics and chemistry at oxide surfaces, 1995.
DOI : 10.1017/CBO9780511524301

M. Lannoo and P. Friedel, Atomic and Electronic Structure of Surfaces, 1991.
DOI : 10.1007/978-3-662-02714-1

F. M. De-groot, X-ray absorption and dichroism of transition metals and their compounds, Journal of Electron Spectroscopy and Related Phenomena, vol.67, issue.4, pp.529-622, 1994.
DOI : 10.1016/0368-2048(93)02041-J

M. Imada, A. Fujimori, and Y. , Metal-insulator transitions, Reviews of Modern Physics, vol.70, issue.4, p.1039, 1998.
DOI : 10.1103/RevModPhys.70.1039

R. Hoffmann, Solids and Surfaces : A Chemist's View of Bonding in Extended Structures, 1988.

O. Madelung, Grundlagen der Halbleiterphysik, 1970.
DOI : 10.1007/978-3-642-95158-9

J. Zaanen, G. A. Sawatzky, and J. W. Allen, Band gaps and electronic structure of transition-metal compounds, Physical Review Letters, vol.55, issue.4, p.418, 1985.
DOI : 10.1103/PhysRevLett.55.418

P. W. Tasker, The stability of ionic crystal surfaces, Journal of Physics C: Solid State Physics, vol.12, issue.22, p.4977, 1979.
DOI : 10.1088/0022-3719/12/22/036

K. Kopitzki, Einfürung in die Festkörperphysik, B.G. Teubner Stuttgart, 1993.

R. Fuchs and K. L. Kliewer, Optical Modes of Vibration in an Ionic Crystal Slab, Physical Review, vol.140, issue.6A, pp.2076-2088, 1965.
DOI : 10.1103/PhysRev.140.A2076

K. Hauffe and S. R. Morrison, Adsorption, 1973.
DOI : 10.1515/9783110842395

V. E. Henrich and P. A. Cox, Fundamentals of gas-surface interactions on metal oxides, Applied Surface Science, vol.72, issue.4, pp.277-284, 1993.
DOI : 10.1016/0169-4332(93)90363-G

S. Hüfner, Photoelectron Spectroscopy : Principles and Applications, 25] W. Ludwig and C. Falter. Symmetries in Physics, 1988.

H. Lüth, Surfaces and Interfaces of Solids, 1993.
DOI : 10.1007/978-3-662-10159-9

G. Ertl and J. Küppers, Low Energy Electrons and Surface Chemistry. VCH Verlagsgesellschaft, 2., completely rev, 1985.

B. S. Wherrett, Group Theory for Atoms, Molecules and Solids, 1986.

P. K. Ghosh, Introduction to Photoelectron Spectroscopy, 1983.

R. J. Lad and V. E. Henrich, Electronic structure of MnO studied by angle-resolved and resonant photoemission, Physical Review B, vol.38, issue.15, p.10860, 1988.
DOI : 10.1103/PhysRevB.38.10860

W. Eberhardt and F. J. Himpsel, Dipole selection rules for optical transitions in the fcc and bcc lattices, Physical Review B, vol.21, issue.12, p.5572, 1980.
DOI : 10.1103/PhysRevB.21.5572

G. Wendin, Breakdown of one-electron pictures in photoelectron spectra, 1981.
DOI : 10.1007/BFb0111504

J. G. Chen, NEXAFS investigations of transition metal oxides, nitrides, carbides, sulfides and other interstitial compounds, Surface Science Reports, vol.30, issue.1-3, pp.1-152, 1997.
DOI : 10.1016/S0167-5729(97)00011-3

F. M. De-groot, J. C. Fuggle, B. T. Thole, and G. A. Sawatzky, transition-metal compounds: An atomic multiplet description including the crystal field, Physical Review B, vol.42, issue.9, p.5459, 1990.
DOI : 10.1103/PhysRevB.42.5459

M. Abbate, H. Pen, M. T. Czyzyk, F. M. De-groot, J. C. Fuggle et al., Soft X-ray absorption spectroscopy of vanadium oxides, Journal of Electron Spectroscopy and Related Phenomena, vol.62, issue.1-2, pp.185-195, 1993.
DOI : 10.1016/0368-2048(93)80014-D

H. Freund and M. Neumann, Photoemission of molecular adsorbates, Applied Physics A Solids and Surfaces, vol.52, issue.1, pp.3-23, 1988.
DOI : 10.1007/BF00619695

T. Gustafsson and E. W. Plummer, Photoemission and the Electronic Properties of Surfaces, chapter 12 : Valence Photoemission from Adsorbates, 1978.

C. E. Meloan, Elementary Infrared Spectroscopy. The Macmillan Compagny, 1963.

H. Ibach and D. L. Mills, ?????????????????????????? ?????????????????????? ???????????????????????????? ???????????? ?????? ???????????????????????? ?????????????????????????? ??????????????????, Il Nuovo Cimento B Series 11, vol.55, issue.2, 1982.
DOI : 10.1007/BF02725821

M. D. Negra, M. Sambi, and G. Granozzi, Ultrathin VOx/TiO2(110) (x???1) film preparation by controlled oxidation of metal deposits, Surface Science, vol.436, issue.1-3, pp.227-236, 1999.
DOI : 10.1016/S0039-6028(99)00666-4

M. D. Negra, M. Sambi, and G. Granozzi, The structure of an ultrathin VOx (x???1) film grown epitaxially on TiO2 (110), Surface Science, vol.461, issue.1-3, pp.118-128, 2000.
DOI : 10.1016/S0039-6028(00)00543-4

K. Kishi and K. Fujiwara, The structures and chemical states of ultrathin vanadium oxides on Ni(110) surface studied by LEED and XPS, Journal of Electron Spectroscopy and Related Phenomena, vol.85, issue.1-2, pp.123-134, 1997.
DOI : 10.1016/S0368-2048(96)03093-9

K. Kishi, Y. Hayakawa, and K. Fujiwara, Preparation of ultrathin nickel oxide on ordered vanadium oxide films grown on Cu(100) surface studied by LEED and XPS, Surface Science, vol.356, issue.1-3, pp.171-180, 1996.
DOI : 10.1016/0039-6028(96)00015-5

M. A. Van-hove, R. J. Koestner, P. C. Stair, J. P. Bibérian, L. L. Kesmodel et al., The surface reconstructions of the (100) crystal faces of iridium, platinum and gold, Surface Science, vol.103, issue.1, pp.189-217, 1981.
DOI : 10.1016/0039-6028(81)90107-2

K. H. Rieder, T. Engel, R. H. Swendsen, and M. Manninen, A helium diffraction study of the reconstructed Au(100) surface, Surface Science, vol.127, issue.2, pp.223-242, 1983.
DOI : 10.1016/0039-6028(83)90415-6

G. A. Sawatzky and D. Post, X-ray photoelectron and Auger spectroscopy study of some vanadium oxides, Physical Review B, vol.20, issue.4, p.1546, 1979.
DOI : 10.1103/PhysRevB.20.1546

Z. Zhang and V. E. Henrich, Surface electronic structure of V2O5(001): defect states and chemisorption, Surface Science, vol.321, issue.1-2, pp.133-144, 1994.
DOI : 10.1016/0039-6028(94)90034-5

R. Zimmermann, P. Steiner, R. Claessen, F. Reinert, S. Hüfner et al., Electronic structure of 3d-transition-metal oxides: on-site Coulomb repulsion versus covalency, Journal of Physics: Condensed Matter, vol.11, issue.7, pp.1657-1682, 1999.
DOI : 10.1088/0953-8984/11/7/002

G. Van-der-laan and I. W. Kirkman, The 2p absorption spectra of 3d transition metal compounds in tetrahedral and octahedral symmetry, Journal of Physics: Condensed Matter, vol.4, issue.16, pp.4189-4204, 1992.
DOI : 10.1088/0953-8984/4/16/019

S. Surnev, G. Kresse, M. Sock, M. G. Ramsey, and F. P. Netzer, Surface structures of ultrathin vanadium oxide films on Pd(), Surface Science, vol.495, issue.1-2, pp.91-106, 2001.
DOI : 10.1016/S0039-6028(01)01503-5

H. Freund, B. Dillmann, O. Seiferth, G. Klivenyi, M. Bender et al., Molecules on oxide surfaces, Catalysis Today, vol.32, issue.1-4, pp.1-10, 1996.
DOI : 10.1016/S0920-5861(96)00072-7

B. Dillmann, F. Rohr, O. Seiferth, G. Klivenyi, M. Bender et al., (0001)/Cr(110), Faraday Discuss., vol.68, issue.65, p.295, 1996.
DOI : 10.1039/FD9960500295

M. J. Altarelli and . Mag, Studies of magnetic order with synchrotron radiation: where do we go from here?, Journal of Magnetism and Magnetic Materials, vol.233, issue.1-2, pp.1-7, 2001.
DOI : 10.1016/S0304-8853(01)00217-7

J. W. Taylor, T. J. Smith, K. H. Andersen, H. Capellmann, R. K. Kremer et al., Spin-spin correlations in the insulating and metallic phases of the Mott system V 2 O 3, The European Physical Journal B, vol.12, issue.2, pp.199-207, 1999.
DOI : 10.1007/s100510050996

C. Castellani, C. R. Natoli, and J. Ranninger, in the insulating phase, Physical Review B, vol.18, issue.9, pp.4945-4967, 1978.
DOI : 10.1103/PhysRevB.18.4945

M. Fabrizio, M. Altarelli, and M. Benfatto, X-Ray Resonant Scattering as a Direct Probe of Orbital Ordering in Transition-Metal Oxides, Physical Review Letters, vol.80, issue.15, p.3400, 1998.
DOI : 10.1103/PhysRevLett.80.3400

L. Paolasini, C. Vettier, F. De-bergevin, F. Yakhou, D. Mannix et al., : Resonant X-Ray Scattering Results, Physical Review Letters, vol.82, issue.23, p.4719, 1999.
DOI : 10.1103/PhysRevLett.82.4719

W. Bao, C. Broholm, G. Aeppli, P. Dai, J. M. Honig et al., Dramatic Switching of Magnetic Exchange in a Classic Transition Metal Oxide: Evidence for Orbital Ordering, Physical Review Letters, vol.78, issue.3, p.507, 1997.
DOI : 10.1103/PhysRevLett.78.507

P. Hertel and J. Appel, in the metallic state, Physical Review B, vol.33, issue.4, pp.2098-2113, 1986.
DOI : 10.1103/PhysRevB.33.2098

V. A. Ivanov, The tight-binding approach to the corundum-structure d compounds, Journal of Physics: Condensed Matter, vol.6, issue.10, pp.2065-2076, 1994.
DOI : 10.1088/0953-8984/6/10/024

J. B. Goodenough, Metallic oxides, Progress in Solid State Chemistry, vol.5, p.145, 1971.
DOI : 10.1016/0079-6786(71)90018-5

M. Catti and G. Sandrone, Ab initio study of corundum-like Me2O3oxides (Me=Ti, V, Cr, Fe, Co, Ni), Faraday Discussions, vol.106, pp.189-203, 1997.
DOI : 10.1039/a701580a

P. J. Brown, M. M. Costa, and K. R. Ziebeck, Paramagnetically aligned spin density in the metallic phase of : evidence for orbital exchange correlation, Journal of Physics: Condensed Matter, vol.10, issue.42, pp.9581-9589, 1998.
DOI : 10.1088/0953-8984/10/42/022

J. C. Slater, Magnetic Effects and the Hartree-Fock Equation, Physical Review, vol.82, issue.4, p.538, 1951.
DOI : 10.1103/PhysRev.82.538

N. F. Mott, The transition to the metallic state, Philosophical Magazine, vol.115, issue.62, p.287, 1961.
DOI : 10.1080/14786436108243318

R. Zimmermann, R. Claessen, F. Reinert, P. Steiner, and S. Hüfner, Strong hybridization in vanadium oxides: evidence from photoemission and absorption spectroscopy, Journal of Physics: Condensed Matter, vol.10, issue.25, pp.5697-5716, 1998.
DOI : 10.1088/0953-8984/10/25/018

K. E. Smith and V. E. , Molecular orbital effects on resonant photoemission from Ti2O3 and V2O3, Solid State Communications, vol.68, issue.1, pp.29-32, 1988.
DOI : 10.1016/0038-1098(88)90238-4

K. E. Smith and V. E. Henrich, orbitals, Physical Review B, vol.38, issue.14, p.9571, 1988.
DOI : 10.1103/PhysRevB.38.9571

K. E. Smith and V. E. Henrich, (101??2), Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, vol.6, issue.3, p.831, 1988.
DOI : 10.1116/1.575077

K. Hermann and M. Witko, Theory of physical and chemical behavior of transition metal oxides: vanadium and molybdenum oxides, Oxide Surfaces, vol.9, pp.136-198, 2001.
DOI : 10.1016/S1571-0785(01)80024-9

V. Maurice, S. Cadot, and P. Marcus, XPS, LEED and STM study of thin oxide films formed on Cr(110), Surface Science, vol.458, issue.1-3, pp.195-215, 2000.
DOI : 10.1016/S0039-6028(00)00439-8

T. Uozomi, A. Okada, R. Zimmermann, S. Steiner, Y. Tezuka et al., Theoretical and experimental studies on the electronic structure of M2O3 (M = Ti, V, Cr, Mn, Fe) compounds by systematic analysis of high-energy spectroscopy, Journal of Electron Spectroscopy and Related Phenomena, vol.83, issue.1, pp.9-20, 1997.
DOI : 10.1016/S0368-2048(96)03063-0

G. Van-der-laan, C. Westra, C. Haas, and G. A. Sawatzky, Satellite structure in photoelectron and Auger spectra of copper dihalides, Physical Review B, vol.23, issue.9, p.4369, 1981.
DOI : 10.1103/PhysRevB.23.4369

F. M. De-groot, M. Grioni, J. C. Fuggle, J. Ghijsen, G. A. Sawatzky et al., x-ray-absorption edges of transition-metal oxides, Physical Review B, vol.40, issue.8, p.5715, 1989.
DOI : 10.1103/PhysRevB.40.5715

K. Held, G. Keller, V. Eyert, D. Vollhardt, and V. I. Anisimov, Study, Physical Review Letters, vol.86, issue.23, p.5345, 2001.
DOI : 10.1103/PhysRevLett.86.5345
URL : https://hal.archives-ouvertes.fr/hal-01503107

C. A. Coulson, Die chemische Bindung, 1969.

J. W. Gadzuk, Surface molecules and chemisorption. II. Photoemission angular distributions, Physical Review B, vol.10, issue.12, pp.5030-5044, 1974.
DOI : 10.1103/PhysRevB.10.5030

P. Avouris and R. E. Walkup, Fundamental Mechanisms of Desorption and Fragmentation Induced by Electronic Transitions at Surfaces, Annual Review of Physical Chemistry, vol.40, issue.1, pp.173-206, 1989.
DOI : 10.1146/annurev.pc.40.100189.001133

G. Kotliar and G. Moeller, Spectroscopy of Mott Insulators and Correlated Metals : proceedings of the 17th Taniguchi Symposium, pp.15-27, 1995.

A. Fujimori, I. Hase, H. Namatame, Y. Fujishima, Y. Tokura et al., configuration, Physical Review Letters, vol.69, issue.12, p.1796, 1992.
DOI : 10.1103/PhysRevLett.69.1796

K. Morikawa, T. Mizokawa, K. Kobayashi, A. Fujimori, H. Eisaki et al., : Influence of long-range Coulomb interaction, Physical Review B, vol.52, issue.19, p.13711, 1995.
DOI : 10.1103/PhysRevB.52.13711

I. L. Botto, M. B. Vassallo, E. J. Baran, and G. Minelli, IR spectra of VO2 and V2O3, Materials Chemistry and Physics, vol.50, issue.3, pp.267-270, 1997.
DOI : 10.1016/S0254-0584(97)01940-8

A. S. Barker, Infrared Lattice Vibrations and Dielectric Dispersion in Corundum, Physical Review, vol.132, issue.4, pp.1474-1481, 1963.
DOI : 10.1103/PhysRev.132.1474

H. Bialas and H. J. Stolz, Lattice dynamics of sapphire (corundum), Zeitschrift f???r Physik B Condensed Matter and Quanta, vol.47, issue.C4, pp.319-324, 1975.
DOI : 10.1007/BF01325390

R. Cataliotti, Transmission and reflectance phonon spectra of corundum single crystals, The Journal of Chemical Physics, vol.72, issue.5, pp.3304-3308, 1979.
DOI : 10.1063/1.439567

H. Schober, T. May, B. Dorner, D. Strauch, U. Steigenberger et al., Lattice dynamics of Cr2O3, Zeitschrift f???r Physik B Condensed Matter, vol.13, issue.2, pp.197-205, 1995.
DOI : 10.1007/BF01324525

G. Lucovsky, R. J. Sladek, and J. W. Allen, electronic effects, Physical Review B, vol.16, issue.12, pp.5452-5459, 1977.
DOI : 10.1103/PhysRevB.16.5452

Q. Guo, D. Y. Kim, S. C. Street, and D. W. Goodman, Ordered binary oxide films of V2O3(0001) on Al2O3, Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, vol.17, issue.4, p.1887, 1999.
DOI : 10.1116/1.581699

K. Kimura, S. Katsumata, Y. Achiba, T. Yamazaki, and S. Iwata, Handbook of He I photoelectron spectra of fundamental organic molecules, 1981.

M. A. Henderson, S. A. Joyce, and J. R. Rustad, Interaction of water with the (1??1) and (2??1) surfaces of ??-Fe2O3(012), Surface Science, vol.417, issue.1, pp.66-81, 1998.
DOI : 10.1016/S0039-6028(98)00662-1

M. A. Henderson and S. A. Chambers, HREELS, TPD and XPS study of the interaction of water with the ??-Cr2O3(001) surface, Surface Science, vol.449, issue.1-3, pp.135-150, 2000.
DOI : 10.1016/S0039-6028(99)01246-7

D. S. Toledano, P. Metcalf, and V. E. Henrich, Photoemission studies of H2O adsorption on pure and Cr-doped V2O3, Surface Science, vol.472, issue.1-2, pp.21-32, 2001.
DOI : 10.1016/S0039-6028(00)00912-2

P. A. Thiel and T. E. Madey, The interaction of water with solid surfaces: Fundamental aspects, Surface Science Reports, vol.7, issue.6-8, pp.211-385, 1987.
DOI : 10.1016/0167-5729(87)90001-X

L. Giordano, J. Goniakowski, and J. Suzanne, ) Water Monolayer Deposited on the MgO (100) Surface, Physical Review Letters, vol.81, issue.6, p.1271, 1998.
DOI : 10.1103/PhysRevLett.81.1271

J. Fock, H. Lau, and E. E. Koch, Electronic band structure of solid CO2 as determined from the hv-dependence of photoelectron emission, Chemical Physics, vol.83, issue.3, p.377, 1984.
DOI : 10.1016/0301-0104(84)85013-2

J. A. Connor, M. Considine, and I. H. Hillier, Low energy photoelectron spectroscopy of solids. Photoelectron spectra of carbonate, phosphate, sulphate, triborate and ethanoate ions, Journal of the Chemical Society, Faraday Transactions 2, vol.74, pp.1285-1291, 1978.
DOI : 10.1039/f29787401285

J. Wambach, G. Odörfer, H. Freund, H. Kuhlenbeck, and N. , Influence of alkali co-adsorption on the adsorption and reaction of CO2 on Pd(111), Surface Science, vol.209, issue.1-2, p.159, 1989.
DOI : 10.1016/0039-6028(89)90065-4

A. A. Davydov, Infrared Spectroscopy of Adsorbed Species on the Surface of Transition Metal Oxides, 1984.

J. Mascetti and M. Tranquille, IR evidence for the formation of CO2 transition-metal atom complexes in low-temperature matrices, Surface Science, vol.156, pp.201-205, 1985.
DOI : 10.1016/0039-6028(85)90575-8

H. Freund and M. W. Roberts, Surface chemistry of carbon dioxide, Surface Science Reports, vol.25, issue.8, p.225, 1996.
DOI : 10.1016/S0167-5729(96)00007-6

B. Bartos, H. Freund, H. Kuhlenbeck, M. Neumann, H. Lindner et al., Adsorption and reaction of CO2 and CO2/O CO-adsorption on Ni(110): Angle resolved photoemission (ARUPS) and electron energy loss (HREELS) studies, Surface Science, vol.179, issue.1, pp.59-89, 1987.
DOI : 10.1016/0039-6028(87)90120-8

Y. Fukuda and I. Toyoshima, AES and UPS studies of CO and CO2 adsorption on Mg and MgO, Surface Science, vol.158, issue.1-3, pp.482-489, 1985.
DOI : 10.1016/0039-6028(85)90324-3

C. Xu, B. Dillmann, H. Kuhlenbeck, and H. Freund, (111), Physical Review Letters, vol.67, issue.25, pp.3551-3554, 1991.
DOI : 10.1103/PhysRevLett.67.3551
URL : https://hal.archives-ouvertes.fr/hal-00574398

J. W. Davenport, and CO, Physical Review Letters, vol.36, issue.16, pp.945-949, 1976.
DOI : 10.1103/PhysRevLett.36.945

M. Beutl, J. Lesnik, E. Lundgren, C. Kovicka, P. Varga et al., Interaction of H2, CO and O2 with a vanadium (111) surface, Surface Science, vol.447, issue.1-3, pp.245-258, 2000.
DOI : 10.1016/S0039-6028(99)01200-5

P. Hollins, The influence of surface defects on the infrared spectra of adsorbed species, Surface Science Reports, vol.16, issue.2, pp.51-94, 1992.
DOI : 10.1016/0167-5729(92)90008-Y