Publikationen
2012
Persistence of surface domain structures for a bulk ferroelectric above TC, A. Höfer, M. Fechner, K. Duncker, M. Hölzer, I. Mertig, and W. Widdra, Phys. Rev. Lett. 108, 087602 (2012).
Improved extraction of I-V curves from low-energy electron diffraction images, K.-M. Schindler, M. Huth, and W. Widdra, Chem. Phys. Lett. (in press),(2012).
Oxygen-deficient ordered phases of ultrathin BaTiO3 films on Pt(111), S. Förster, K. Meinel, K.-M. Schindler, and W. Widdra, Surf. Interface Anal. (in press),(2012).
2011
Adsorption of α-sexithiophene on Au(001): Molecule-induced partial lifting of the substrate reconstruction, A. Höfer, K. Duncker, M. Kiel, S. Wedekind and W. Widdra, Physical Review B 83, 075414 (2011)
Laser-excited PEEM using a fully tunable fs-laser system, Hofer, A.; Duncker, K.; Kiel, M.; Forster, S.; Widdra, W.; IBM Journal of Research and Development, IBM J. Res. Dev. 55, 4:1 (2011)
High-resolution phonon study of the Ag(100) surface, K. L. Kostov, S. Polzin, and W. Widdra, Journal of Physics: Condensed Matter 23, 484006 (2011).
Epitaxial BaTiO3(100) films on Pt(100): A LEED, STM, and XPS study
S. Förster, M. Huth, K.-M. Schindler, and W. Widdra, J. Chem. Phys. 135, 104701 (2011).
2010
Vibrational characterization of ethylene adsorption and its thermal evolution on Si(001)-(2X1): Identification of majority and minority species, L. Krassimir Kostov, R. Nathaniel,T. Mineva and W. Widdra, The Journal of chemical physics 133, 054705 (2010)
Growth, structure, and thermal stability of epitaxial BaTiO3 films on Pt(111), S. Förster, W. Widdra, Surface Science 604 2163–2169 (2010)
Thickness dependent vibrational and electronic properties of MnO(100) thin films grown on Pt(111), S. Sachert, S. Polzin, K. Kostov and W. Widdra, Physical Review B 81, 195424 (2010)
2009
Low-energy electron diffraction structure determination of an ultrathin CoO film on Ag(001), K.-M. Schindler , J. Wang, A. Chassé, H. Neddermeyer, W. Widdra, Surface Science 603 2658-2663 (2009)
2008
Auger electron diffraction in thin CoO films on Au(111, A. Chasse, L. Niebergall, M. Heiler, H. Neddermeyer, and K.-M. Schindler, Surf. Sci., 602, 443-51 (2008).
Commensurate surface structures and concerted cis-trans-isomerization within ordered monolayers of alpha-sexithiophene on Ag(001), K. Duncker, M. Kiel, A. Höfer, and W. Widdra Phys. Rev. B, 77, 155423-8 (2008).
Growth, atomic structure and vibrational properties of MnO ultrathin films on Pt(111), C. Hagendorf; S. Sachert; B. Bochmann; K.L. Kostov; W. Widdra, Phys. Rev. B, 77, 075406 (2008).
2007
Vibrational characterization of different benzene phases on flat and vicinal Si(100) surfaces, B. Naydenov; W. Widdra, Journal Chemical Physics, 127, 154711 (2007).
Activation and isomerization of n-butane on sulfated zirconia model systems - An integrated study across the materials and pressure gaps,C. Breitkopf; H. Papp; X. Li; R. Olindo; J.A. Lercher; R. Lloyd; S. Wrabetz; F.C. Jentoft; K. Meinel; S. Förster; K.-M. Schindler; H. Neddermeyer; W. Widdra; A. Hofmann; J. Sauer, Phys. Chem. Chem. Phys. 9, 1-19 (2007).
Molecular structure and chiral separation in alpha-sexithiophene ultrathin films on Au(111): Low-energy electron diffraction and scanning tunneling microscopy, M. Kiel, K. Duncker, S. Förster, C. Hagendorf, and W. Widdra, Phys. Rev. B, 1593-1600 (2007).
2006
Two bonding configurations of acetylene on Si(001)-(2x1): A combined HREELS and DFT study, T. Mineva, R. Nathaniel, K.L. Kostov, and W. Widdra, Journal of Chemical Physics 125, 194712-1 -12 (2006).
Interaction of SO3 with c-ZrO2 (111) films on Pt(111), K. Meinel, A. Hofmann, S. Förster, R. Kulla, K.-M. Schindler, H. Neddermeyer, J. Sauer, and W. Widdra, Phys. Chem. Chem. Phys. 8, 1593-1600 (2006).
Lateral interactions and nonequilibrium in adsorption and desorption. 1. Experimental results for (2x2)-(3O + NO)/Ru(001), K. L. Kostov, M. Gsell, W. Widdra, S. H. Payne, H. J. Kreuzer, and D. Menzel, Surface Science, 4650 (2006).
Surface and interface structures of epitaxial ZrO2 films on Pt(111), K. Meinel, A. Eichler, S. Förster, K.-M. Schindler, H. Neddermeyer, and W. Widdra, Phys. Rev. B 74, 235444 (2006).
Charging Mechanisms of Trapped Element-Selectively Excited Nanoparticles Exposed to Soft X Rays, M. Grimm, B. Langer, S. Schlemmer, T. Lischke, U. Becker, W. Widdra, D. Gerlich, R. Flesch, and E. Rühl, Phys. Rev. Lett. 96, 066801-4 (2006).
Pressure-dependent Ni-O phase transitions and Ni oxide formation on Pt(111): An in-situ STM study at elevated temperatures, C. Hagendorf, R. Shantyr, H. Neddermeyer, and W. Widdra Phys. Chem. Chem. Phys. 8, 1575-83 (2006).
2005
Anisotropy in ordered sexithiophene thin films studied by angle-resolved photoemission using combined laser and synchrotron radiation, C. E. Heiner, J. Dreyer, I. V. Hertel, N. Koch, H.-H. Ritze, W. Widdra, and B. Winter, Appl. Phys. Lett., 87, 093501-3 (2005).
Photoelectron Spectroscopy on Thin Films of Extended Zinc Porphyrazines,D. Pop, B. Winter, W. Freyer, W. Widdra, and I. V. Hertel, Journal of Physical Chemistry B, 109, 7826 -33 (2005).
2004
Charge Carrier Dynamics at the SiO2/Si(100) Surface: A Time-Resolved Photoemission Study with Combined Laser and Synchrotron Radiation, D. Bröcker, T. Gießel, and W. Widdra, Chemical Physics 299, 247-51 (2004).
Scanning tunneling microscopy, spectroscopy and tunneling-induced light emission on donor-doped BaTiO3, T. Doege, C. Hagendorf, and H. Neddermeyer, Surface Science 566-568, 1211-16 (2004).
New Setup To Study Trapped Nano-Particles Using Synchrotron Radiation, M. Grimm, B. Langer, S. Schlemmer, T. Lischke, W. Widdra, D. Gerlich, U. Becker, and E. Rühl, AIP Conference Proceedings, Atomic, Molecular and Chemical Physics 705, 1062-65 (2004).
Vibrational properties and lateral interactions of the (2x2)-(O+CO) coadsorbate layer on Ru(001), K. L. Kostov, W. Widdra, and D. Menzel, Journal of Physical Chemistry 108, 14324 - 31 (2004).
Hydrogen on Ru(001) revisited: Vibrational structure, adsorption states, and lateral coupling, K. L. Kostov, W. Widdra, and D. Menzel, Surface Science 560, 130-44 (2004).
Comparison of structural re-organisations observed on pre-patterned vicinal Si(1 1 1) and Si(1 0 0) surfaces during heat treatment, A. Kraus, H. Neddermeyer, W. Wulfhekel, D. Sander, T. Maroutian, F. Dulot, A. Martinez-Gil, and M. Hanbucken, Applied Surface Science 234, 307-12 (2004).
STM, LEED, and DFT characterization of epitaxial ZrO2 films on Pt(111), K. Meinel, A. Eichler, K.-M. Schindler, and H. Neddermeyer, Surface Science 562, 204-18 (2004).
Photoelectron Spectroscopy on Thin Films of Extended Copper Porphyrazines, D. Pop, B. Winter, W. Freyer, R. L. Weber, W. Widdra, and I. V. Hertel, Journal of Physical Chemistry B 108, 9158-67 (2004).
Scanning tunneling microscopy and spectroscopy studies on structural and electronic properties of thin films of Co oxides and oxide precursor states on Ag(001), R. Shantyr, C. Hagendorf, and H. Neddermeyer, Thin Solid Films 464-465, 65-75 (2004).
Scanning tunneling microscopy and spectroscopy of CoO precursor and oxide layers on Ag(001), R. Shantyr, C. Hagendorf, and H. Neddermeyer, Surface Science 566-568, 68-73 (2004).
Growth Mechanism and Angle-Resolved Photoemission Spectra of Cobalt Oxide (CoO) Thin Films on Ag(100), S. Sindhu, M. Heiler, K.-M. Schindler, W. Widdra, and H. Neddermeyer, Surface Science 566-568, 471-75 (2004).
Photoemission from aqueous Alkali-metal-Iodide salt solutions using EUV synchrotron radiation, R. L. Weber, B. Winter, P. M. Schmidt, W. Widdra, I. V. Hertel, M. Dittmar, and M. Faubel, Journal of Physical Chemistry 108, 4729-36 (2004).
Full Valence Band Photoemission from Liquid Water Using EUV Synchrotron Radiation, B. Winter, R. L. Weber, W. Widdra, M. Dittmar, and M. Faubel, Journal of Physical Chemistry A 108, 2625-32 (2004).