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User Project Publications


Open list in Research Information System

2013

Lithium niobate dielectric function and second-order polarizability tensor from massively parallel ab initio calculations

A. Riefer, M. Rohrmüller, M. Landmann, S. Sanna, E. Rauls, N.J. Vollmers, R. Hölscher, M. Witte, Y. Li, U. Gerstmann, A. Schindlmayr, W.G. Schmidt, in: High Performance Computing in Science and Engineering ‘13, Springer, 2013, pp. 93-104

WoS

The frequency-dependent dielectric function and the second-order polarizability tensor of ferroelectric LiNbO3 are calculated from first principles. The calculations are based on the electronic structure obtained from density-functional theory. The subsequent application of the GW approximation to account for quasiparticle effects and the solution of the Bethe–Salpeter equation yield a dielectric function for the stoichiometric material that slightly overestimates the absorption onset and the oscillator strength in comparison with experimental measurements. Calculations at the level of the independent-particle approximation indicate that these deficiencies are at least partially related to the neglect of intrinsic defects typical for the congruent material. The second-order polarizability calculated within the independent-particle approximation predicts strong nonlinear coefficients for photon energies above 1.5 eV. The comparison with measured data suggests that self-energy effects improve the agreement between experiment and theory. The intrinsic defects of congruent samples reduce the optical nonlinearities, in particular for the 21 and 31 tensor components, further improving the agreement with measured data.


    Formation and control of Turing patterns in a coherent quantum fluid

    V. Ardizzone, P. Lewandowski, M.H. Luk, Y.C. Tse, N.H. Kwong, A. Lücke, M. Abbarchi, E. Baudin, E. Galopin, J. Bloch, A. Lemaitre, P.T. Leung, P. Roussignol, R. Binder, J. Tignon, S. Schumacher, Scientific Reports (2013)


    Charge Photogeneration in Donor–Acceptor Conjugated Materials: Influence of Excess Excitation Energy and Chain Length

    R. Tautz, E. Da Como, C. Wiebeler, G. Soavi, I. Dumsch, N. Fröhlich, G. Grancini, S. Allard, U. Scherf, G. Cerullo, S. Schumacher, J. Feldmann, Journal of the American Chemical Society (2013), pp. 4282-4290


    Transverse optical instability patterns in semiconductor microcavities: Polariton scattering and low-intensity all-optical switching

    M.H. Luk, Y.C. Tse, N.H. Kwong, P.T. Leung, P. Lewandowski, R. Binder, S. Schumacher, Physical Review B (2013)


    Excited-State Absorption of Conjugated Polymers in the Near-Infrared and Visible: A Computational Study of Oligofluorenes

    S. Ling, S. Schumacher, I. Galbraith, M.J. Paterson, The Journal of Physical Chemistry C (2013), pp. 6889-6895


    Selection rules and linear absorption spectra of carbon nanotubes in axial magnetic fields

    H. Liu, S. Schumacher, T. Meier, Physical Review B (2013)


    Geometrical and optical benchmarking of copper guanidine-quinoline complexes: Insights from TD-DFT and many-body perturbation theory†

    A. Jesser, M. Rohrmüller, W.G. Schmidt, S. Herres-Pawlis, Journal of Computational Chemistry (2013), 35(1-2), pp. 1-17


    LiNb1-xTaxO3Electronic Structure and Optical Response fromFirst-PrinciplesCalculations

    A. Riefer, S. Sanna, W.G. Schmidt, Ferroelectrics (2013), 447, pp. 78-85


    Vibrational Fingerprints of LiNbO3-LiTaO3Mixed Crystals

    S. Sanna, A. Riefer, S. Neufeld, W.G. Schmidt, G. Berth, M. Rüsing, A. Widhalm, A. Zrenner, Ferroelectrics (2013), 447, pp. 63-68


    Charge compensation by long-period reconstruction in strongly polar lithium niobate surfaces

    S. Sanna, S. Rode, R. Hölscher, S. Klassen, C. Marutschke, K. Kobayashi, H. Yamada, W.G. Schmidt, A. Kühnle, Physical Review B (2013), 88


    Adsorption of PTCDA on NaCl(100) and KCl(100)

    H. Aldahhak, W.G. Schmidt, E. Rauls, Surface Science (2013), 617, pp. 242-248


    Optical response of stoichiometric and congruent lithium niobate from first-principles calculations

    A. Riefer, S. Sanna, A. Schindlmayr, W.G. Schmidt, Physical Review B (2013), 87(19)

    WoS

    The frequency-dependent dielectric function and the second-order polarizability tensor of ferroelectric LiNbO3 are calculated from first principles. The calculations are based on the electronic structure obtained from density-functional theory. The subsequent application of the GW approximation to account for quasiparticle effects and the solution of the Bethe-Salpeter equation for the stoichiometric material yield a dielectric function that slightly overestimates the absorption onset and the oscillator strength in comparison with experimental measurements. Calculations at the level of the independent-particle approximation indicate that these deficiencies are, at least, partially related to the neglect of intrinsic defects typical for the congruent material. The second-order polarizability calculated within the independent-particle approximation predicts strong nonlinear coefficients for photon energies above 1.5 eV. The comparison with measured data suggests that the inclusion of self-energy effects in the nonlinear optical response leads to a better agreement with experiments. The intrinsic defects of congruent samples reduce the optical nonlinearities, in particular, for the 21 and 31 tensor components, further improving the agreement between experiments and theory.


    2012

    Collective Effects in Second-Harmonic Generation from Split-Ring-Resonator Arrays

    S. Linden, F.B.P. Niesler, J. Förstner, Y. Grynko, T. Meier, M. Wegener, Physical Review Letters (2012)


    Tailoring the high-harmonic emission in two-level systems and semiconductors by pulse shaping

    M. Reichelt, A. Walther, T. Meier, Journal of the Optical Society of America B (2012)


    Spectral Signatures of Polarons in Conjugated Co-polymers

    C. Wiebeler, R. Tautz, J. Feldmann, E. von Hauff, E. Da Como, S. Schumacher, The Journal of Physical Chemistry B (2012), pp. 4454-4460


    Dynamics of fluorescence depolarisation in star-shaped oligofluorene-truxene molecules

    N.A. Montgomery, G.J. Hedley, A. Ruseckas, J. Denis, S. Schumacher, A.L. Kanibolotsky, P.J. Skabara, I. Galbraith, G.A. Turnbull, I.D.W. Samuel, Physical Chemistry Chemical Physics (2012)


    Simulation and testing of hybrid structures consisting of press-hardened steel and CFRP

    C. Reuter, M. Frantz, C. Lauter, H. Block, T. Tröster, 2012


    Simulation and manufacturing of deep drawn parts reinforced by carbon fibre prepregs

    B. Gorny, F. Hankeln, C. Lauter, H.C. Schmidt, U. Damerow, R. Mahnken, H.J. Maier, T. Tröster, W. Homberg, 2012



    Substrate Induced Thermal Decomposition of Perfluoro-Pentacene Thin Films on the Coinage Metals

    C. Schmidt, T. Breuer, S. Wippermann, W.G. Schmidt, G. Witte, The Journal of Physical Chemistry C (2012), 116, pp. 24098-24106


    Atomistic Picture of Charge Density Wave Formation at Surfaces

    S. Wall, B. Krenzer, S. Wippermann, S. Sanna, F. Klasing, A. Hanisch-Blicharski, M. Kammler, W.G. Schmidt, M. Horn-von Hoegen, Physical Review Letters (2012), 109(18)


    Ferroelectric phase transition in LiNbO3: Insights from molecular dynamics

    S. Sanna, W.G. Schmidt, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control (2012), 59(9), pp. 1925-1928


    Linear and nonlinear optical response of LiNbO3 calculated from first principles

    A. Riefer, S. Sanna, A.V. Gavrilenko, W.G. Schmidt, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control (2012), 59(9), pp. 1929-1933


    Polarization-dependent methanol adsorption on lithium niobate Z-cut surfaces

    A. Riefer, S. Sanna, W.G. Schmidt, Physical Review B (2012), 86(12)


    Atomic-resolution imaging of the polar (0001¯) surface of LiNbO3in aqueous solution by frequency modulation atomic force microscopy

    S. Rode, R. Hölscher, S. Sanna, S. Klassen, K. Kobayashi, H. Yamada, W.G. Schmidt, A. Kühnle, Physical Review B (2012), 86(7)


    Fingerprints of order and disorder in the electronic and optical properties of crystalline and amorphous TiO2

    M. Landmann, T. Köhler, S. Köppen, E. Rauls, T. Frauenheim, W.G. Schmidt, Physical Review B (2012), 86(6)


    Interplay between metal-free phthalocyanine molecules and Au(110) substrates

    E. Rauls, W.G. Schmidt, T. Pertram, K. Wandelt, Surface Science (2012), 606, pp. 1120-1125


    The electronic structure and optical response of rutile, anatase and brookite TiO2

    M. Landmann, E. Rauls, W.G. Schmidt, Journal of Physics: Condensed Matter (2012), 24


    2-Aminopyrimidine-silver(I) based organic semiconductors: Electronic structure and optical response

    A. Riefer, E. Rauls, W.G. Schmidt, J. Eberhard, I. Stoll, J. Mattay, Physical Review B (2012), 85(16)


    pH-dependent structure and energetics of H2O/MgO(100)

    P. Thissen, V. Thissen, S. Wippermann, Y.J. Chabal, G. Grundmeier, W.G. Schmidt, Surface Science (2012), 606, pp. 902-907


    Adsorption of OH and H at the LiNbO3(0001) surface

    R. Hölscher, S. Sanna, W.G. Schmidt, physica status solidi (c) (2012), 9(6), pp. 1361-1365


    In-Si(111)(4 × 1)/(8 × 2) nanowires: Electron transport, entropy, and metal-insulator transition

    W.G. Schmidt, S. Wippermann, S. Sanna, M. Babilon, N.J. Vollmers, U. Gerstmann, physica status solidi (b) (2012), 249(2), pp. 343-359


    2011

    Influence of Na adsorption on the quantum conductance and metal-insulator transition of the In-Si(111)(4×1)–(8×2) nanowire array

    W.G. Schmidt, M. Babilon, C. Thierfelder, S. Sanna, S. Wippermann, Physical Review B (2011), 84(11)


    Group-VII point defects in ZnSe

    L.S. dos Santos, W.G. Schmidt, E. Rauls, Physical Review B (2011), 84(11)


    Preserving Charge and Oxidation State of Au(III) Ions in an Agent-Functionalized Nanocrystal Model System

    S. Müllegger, W. Schöfberger, M. Rashidi, T. Lengauer, F. Klappenberger, K. Diller, K. Kara, J.V. Barth, E. Rauls, W.G. Schmidt, R. Koch, ACS Nano (2011), 5(8), pp. 6480-6486


    Band offsets in cubic GaN/AlN superlattices

    C. Mietze, M. Landmann, E. Rauls, H. Machhadani, S. Sakr, M. Tchernycheva, F.H. Julien, W.G. Schmidt, K. Lischka, D.J. As, Physical Review B (2011), 83(19)


    Asymmetric saddling of single porphyrin molecules on Au(111)

    S. Müllegger, M. Rashidi, T. Lengauer, E. Rauls, W.G. Schmidt, G. Knör, W. Schöfberger, R. Koch, Physical Review B (2011), 83(16)


    Methane adsorption on graphene from first principles including dispersion interaction

    C. Thierfelder, M. Witte, S. Blankenburg, E. Rauls, W.G. Schmidt, Surface Science (2011), 605, pp. 746-749


    Localised Phonon Modes at LiNbO3(0001) Surfaces

    S. Sanna, G. Berth, W. Hahn, A. Widhalm, A. Zrenner, W.G. Schmidt, Ferroelectrics (2011), 419, pp. 1-8


    Vibrational properties of the LiNbO3 z-surfaces

    S. Sanna, G. Berth, W. Hahn, A. Widhalm, A. Zrenner, W.G. Schmidt, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control (2011), 58(9), pp. 1751-1756


    Barium titanate ground- and excited-state properties from first-principles calculations

    S. Sanna, C. Thierfelder, S. Wippermann, T.P. Sinha, W.G. Schmidt, Physical Review B (2011), 83(5)


    2010

    Reversal of Coherently Controlled Ultrafast Photocurrents by Band Mixing in Undoped GaAs Quantum Wells

    S. Priyadarshi, A.M. Racu, K. Pierz, U. Siegner, M. Bieler, H.T. Duc, J. Förstner, T. Meier, Physical Review Letters (2010), 104(21)

    It is demonstrated that valence-band mixing in GaAs quantum wells tremendously modifies electronic transport. A coherent control scheme in which ultrafast currents are optically injected into undoped GaAs quantum wells upon excitation with femtosecond laser pulses is employed. An oscillatory dependence of the injection current amplitude and direction on the excitation photon energy is observed. A microscopic theoretical analysis shows that this current reversal is caused by the coupling of the light- and heavy-hole bands and that the hole currents dominate the overall current response. These surprising consequences of band mixing illuminate fundamental physics as they are unique for experiments which are able to monitor electronic transport resulting from carriers with relatively large momenta.


      Tuning quantum-dot based photonic devices with liquid crystals

      K.A. Piegdon, S. Declair, J. Förstner, T. Meier, H. Matthias, M. Urbanski, H. Kitzerow, D. Reuter, A.D. Wieck, A. Lorke, C. Meier, Optics Express (2010), 18(8)

      Microdisks made from GaAs with embedded InAs quantum dots are immersed in the liquid crystal 4-cyano-4’-pentylbiphenyl (5CB). The quantum dots serve as emitters feeding the optical modes of the photonic cavity. By changing temperature, the liquid crystal undergoes a phase transition from the isotropic to the nematic state, which can be used as an effective tuning mechanism of the photonic modes of the cavity. In the nematic state, the uniaxial electrical anisotropy of the liquid crystal molecules can be exploited for orienting the material in an electric field, thus externally controlling the birefringence of the material. Using this effect, an electric field induced tuning of the modes is achieved. Numerical simulations using the finite-differences time-domain (FDTD) technique employing an anisotropic dielectric medium allow to understand the alignment of the liquid crystal molecules on the surface of the microdisk resonator.


      Dynamics of photoexcitation and stimulated optical emission in conjugated polymers: A multiscale quantum-chemistry and Maxwell-Bloch-equations approach

      S. Schumacher, I. Galbraith, A. Ruseckas, G.A. Turnbull, I.D.W. Samuel, Physical Review B (2010)


      Do we know the band gap of lithium niobate?

      C. Thierfelder, S. Sanna, A. Schindlmayr, W.G. Schmidt, Physica Status Solidi C (2010), 7(2), pp. 362-365

      WoS

      Given the vast range of lithium niobate (LiNbO3) applications, the knowledge about its electronic and optical properties is surprisingly limited. The direct band gap of 3.7 eV for the ferroelectric phase – frequently cited in the literature – is concluded from optical experiments. Recent theoretical investigations show that the electronic band‐structure and optical properties are very sensitive to quasiparticle and electron‐hole attraction effects, which were included using the GW approximation for the electron self‐energy and the Bethe‐Salpeter equation respectively, both based on a model screening function. The calculated fundamental gap was found to be at least 1 eV larger than the experimental value. To resolve this discrepancy we performed first‐principles GW calculations for lithium niobate using the full‐potential linearized augmented plane‐wave (FLAPW) method. Thereby we use the parameter‐free random phase approximation for a realistic description of the nonlocal and energydependent screening. This leads to a band gap of about 4.7 (4.2) eV for ferro(para)‐electric lithium niobate.


        Ab initiog-tensor calculation for paramagnetic surface states: hydrogen adsorption at Si surfaces

        U. Gerstmann, M. Rohrmüller, F. Mauri, W.G. Schmidt, physica status solidi (c) (2010), 7(2), pp. 157-160


        Optical anisotropy of Si(111)-(4 × 1)/(8 × 2)-In nanowires calculated fromfirst-principles

        S. Wippermann, W.G. Schmidt, F. Bechstedt, S. Chandola, K. Hinrichs, M. Gensch, N. Esser, K. Fleischer, J.F. McGilp, physica status solidi (c) (2010), 7(2), pp. 133-136


        Catalytic Action of a Cu(111) Surface on Tetraazaperopyrene Polymerization

        S. Blankenburg, E. Rauls, W.G. Schmidt, The Journal of Physical Chemistry Letters (2010), 1, pp. 3266-3270


        Entropy Explains Metal-Insulator Transition of the Si(111)-In Nanowire Array

        S. Wippermann, W.G. Schmidt, Physical Review Letters (2010), 105(12)


        First-principles investigation of CO adsorption on Pt/Ge(001)-(4×2)

        A. Krivosheeva, S. Sanna, W.G. Schmidt, Computational Materials Science (2010), 49(4), pp. 895-898


        Understanding the cubic AlN growth plane from first principles

        E. Rauls, J. Wiebe, W.G. Schmidt, Journal of Crystal Growth (2010), 312, pp. 2892-2895


        First-principles study of water adsorption and a high-density interfacial ice structure on(1×1)-O/Rh(111)

        C. Thierfelder, W.G. Schmidt, Physical Review B (2010), 82(11)


        Lithium niobateX-cut,Y-cut, andZ-cut surfaces fromab initiotheory

        S. Sanna, W.G. Schmidt, Physical Review B (2010), 81(21)


        GaN/LiNbO3 (0001) interface formation calculated from first-principles

        S. Sanna, W.G. Schmidt, Applied Surface Science (2010), 256, pp. 5740-5743


        Chemical reactivity on surfaces: Modeling the imide synthesis from DATP and PTCDA on Au(111)

        E. Rauls, S. Blankenburg, W.G. Schmidt, Physical Review B (2010), 81(12)


        GaN growth on LiNbO3 (0001) - a first-principles simulation

        S. Sanna, W.G. Schmidt, physica status solidi (c) (2010), 7(7-8), pp. 2272-2274


        Temperature dependent stability of self-assembled molecular rows

        S. Blankenburg, W.G. Schmidt, physica status solidi (c) (2010), 7(2), pp. 415-417


        The physics of highly ordered molecular rows

        S. Blankenburg, E. Rauls, W.G. Schmidt, physica status solidi (c) (2010), 7(2), pp. 153-156


        Ab initio investigation of the LiNbO3(0001) surface

        S. Sanna, A.V. Gavrilenko, W.G. Schmidt, physica status solidi (c) (2010), 7(2), pp. 145-148


        Dissociative and molecular adsorption of water onα-Al2O3(0001)

        S. Wippermann, W.G. Schmidt, P. Thissen, G. Grundmeier, physica status solidi (c) (2010), 7(2), pp. 137-140


        2009

        Electron-Spin Beat Susceptibility of Excitons in Semiconductor Quantum Wells

        N.H. Kwong, S. Schumacher, R. Binder, Physical Review Letters (2009)


        The physics of highly ordered molecular rows

        S. Blankenburg, E. Rauls, W.G. Schmidt, physica status solidi (c) (2009), pp. 153-156


        The physics of highly ordered molecular rows

        S. Blankenburg, E. Rauls, W.G. Schmidt, physica status solidi (c) (2009), 7(2), pp. 153-156


        Ab initioinvestigation of the LiNbO3(0001) surface

        S. Sanna, A.V. Gavrilenko, W.G. Schmidt, physica status solidi (c) (2009), pp. 145-148


        Ab initioinvestigation of the LiNbO3(0001) surface

        S. Sanna, A.V. Gavrilenko, W.G. Schmidt, physica status solidi (c) (2009), 7(2), pp. 145-148


        Dissociative and molecular adsorption of water onα-Al2O3(0001)

        S. Wippermann, W.G. Schmidt, P. Thissen, G. Grundmeier, physica status solidi (c) (2009), 7(2), pp. 137-140


        Vacancy clusters created via room temperature irradiation in 6H-SiC

        A. Scholle, S. Greulich-Weber, E. Rauls, W.G. Schmidt, U. Gerstmann, Physica B: Condensed Matter (2009), 404, pp. 4742-4744


        Water adsorption on the α-Al2O3(0001) surface

        P. Thissen, G. Grundmeier, S. Wippermann, W.G. Schmidt, Physical Review B (2009), 80(24)


        Rare-earth defect pairs in GaN: LDA+U calculations

        S. Sanna, W.G. Schmidt, T. Frauenheim, U. Gerstmann, Physical Review B (2009), 80(10)


        Role of Dihydrogen Bonds for the Stabilization of Self-Assembled Molecular Nanostructures

        S. Blankenburg, E. Rauls, W.G. Schmidt, The Journal of Physical Chemistry C (2009), 113, pp. 12653-12657


        Structure of Si(111)-In Nanowires Determined from the Midinfrared Optical Response

        S. Chandola, K. Hinrichs, M. Gensch, N. Esser, S. Wippermann, W.G. Schmidt, F. Bechstedt, K. Fleischer, J.F. McGilp, Physical Review Letters (2009), 102(22)


        Glutamic acid adsorbed on Ag(110): direct and indirect molecular interactions

        S. Blankenburg, W.G. Schmidt, Journal of Physics: Condensed Matter (2009), 21


        Water adsorption on hydrogenated Si(111) surfaces

        B. Lange, R. Posner, K. Pohl, C. Thierfelder, G. Grundmeier, S. Blankenburg, W.G. Schmidt, Surface Science (2009), 603, pp. 60-64


        First-principles calculations of clean Au(110) surfaces and chemisorption of atomic oxygen

        M. Landmann, E. Rauls, W.G. Schmidt, Physical Review B (2009), 79(4)


        QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials

        P. Giannozzi, S. Baroni, N. Bonini, M. Calandra, R. Car, C. Cavazzoni, D. Ceresoli, G.L. Chiarotti, M. Cococcioni, I. Dabo, A. Dal Corso, S. de Gironcoli, S. Fabris, G. Fratesi, R. Gebauer, U. Gerstmann, C. Gougoussis, A. Kokalj, M. Lazzeri, L. Martin-Samos, N. Marzari, F. Mauri, R. Mazzarello, S. Paolini, A. Pasquarello, L. Paulatto, C. Sbraccia, S. Scandolo, G. Sclauzero, A.P. Seitsonen, A. Smogunov, P. Umari, R.M. Wentzcovitch, Journal of Physics: Condensed Matter (2009), 21(39)


        2008

        Optical anisotropy of the In/Si(111)(4×1)/(8×2) nanowire array

        S. Wippermann, W.G. Schmidt, Surface Science (2008), 603, pp. 247-250


        Water adsorption on clean Ni(111) and p(2×2)-Ni(111)-O surfaces calculated from first principles

        S. Wippermann, W.G. Schmidt, Physical Review B (2008), 78(23)


        Spatial modulation of molecular adsorption energies due to indirect interaction

        S. Blankenburg, W.G. Schmidt, Physical Review B (2008), 78


        Influence of the Side Group Aromaticity on the Organic Molecule Adsorption on Cu(110)

        E. Rauls, W.G. Schmidt, Journal of Physical Chemistry C (2008), 112, pp. 11490-11494


        Atomic structure and energetics of thec-GaN(001) surface

        E. Rauls, S.J. Dijkstra, W.G. Schmidt, Physical Review B (2008), 78(11)


        DFT calculations of adenine adsorption on coin metal (110) surfaces

        E. Rauls, S. Blankenburg, W.G. Schmidt, Surface Science (2008), 602, pp. 2170-2174


        Resolving the Optical Spectrum of Water: Coordination and Electrostatic Effects

        A. Hermann, W.G. Schmidt, P. Schwerdtfeger, Physical Review Letters (2008), 100(20)


        Theoretical study of the localization of excess electrons at the surface of ice

        A. Hermann, P. Schwerdtfeger, W.G. Schmidt, Journal of Physics: Condensed Matter (2008), 20


        Adatom-Induced Conductance Modification of In Nanowires: Potential-Well Scattering and Structural Effects

        S. Wippermann, N. Koch, W.G. Schmidt, Physical Review Letters (2008), 100(10)


        Ammonia adsorption on Cl/Si(001): First-principles calculations

        B. Lange, W.G. Schmidt, Surface Science (2008), 602, pp. 1207-1211


        LiNbO3ground- and excited-state properties from first-principles calculations

        W.G. Schmidt, M. Albrecht, S. Wippermann, S. Blankenburg, E. Rauls, F. Fuchs, C. Rödl, J. Furthmüller, A. Hermann, Physical Review B (2008), 77


        2007

        Ethanol adsorbed on ice: A first-principles study

        C. Thierfelder, W.G. Schmidt, Physical Review B (2007), 76(19)


        Long-Range Chiral Recognition due to Substrate Locking and Substrate-Adsorbate Charge Transfer

        S. Blankenburg, W.G. Schmidt, Physical Review Letters (2007), 99(19)


        Steric effects and chirality in the adsorption of glycine and phenylglycine on Cu(110)

        S. Blankenburg, W.G. Schmidt, Nanotechnology (2007), 18


        Quantum conductance of In nanowires on Si(111) from first principles calculations

        S. Wippermann, W.G. Schmidt, A. Calzolari, M.B. Nardelli, A. Stekolnikov, K. Seino, F. Bechstedt, Surface Science (2007), pp. 4045-4047


        Hexagon versus Trimer Formation in In Nanowires on Si(111): Energetics and Quantum Conductance

        A.A. Stekolnikov, K. Seino, F. Bechstedt, S. Wippermann, W.G. Schmidt, A. Calzolari, M.B. Nardelli, Physical Review Letters (2007), 98(2)


        2006

        Tight-binding model for semiconductor quantum dots with a wurtzite crystal structure: From one-particle properties to Coulomb correlations and optical spectra

        S. Schulz, S. Schumacher, G. Czycholl, Physical Review B (2006)


        Experimental and theoretical evidence for a hydrogen stabilizedc(2×2)reconstruction of the P-rich InP(001) surface

        T. Letzig, F. Willig, P.H. Hahn, W.G. Schmidt, Physical Review B (2006), 74(24)


        Adsorption of phenylglycine on copper: Density functional calculations

        S. Blankenburg, W.G. Schmidt, Physical Review B (2006), 74(15)


        Strongly bonded water monomers on the ice Ih basal plane: Density-functional calculations

        C. Thierfelder, A. Hermann, P. Schwerdtfeger, W.G. Schmidt, Physical Review B (2006), 74(4)


        Adsorption of water on chlorine-terminated Si(111) from first principles: Substrate-induced ordering versus intermolecular interactions

        S. Biering, A. Hermann, W.G. Schmidt, Physical Review B (2006), 73(23)


        2005

        Polariton propagation in shallow-confinement heterostructures: Microscopic theory and experiment showing the breakdown of the dead-layer concept

        S. Schumacher, G. Czycholl, F. Jahnke, I. Kudyk, H.I. Rückmann, J. Gutowski, A. Gust, G. Alexe, D. Hommel, Physical Review B (2005)


        Coherent propagation of polaritons in semiconductor heterostructures: Nonlinear pulse transmission in theory and experiment

        S. Schumacher, G. Czycholl, F. Jahnke, I. Kudyk, L. Wischmeier, I. Rückmann, T. Voss, J. Gutowski, A. Gust, D. Hommel, Physical Review B (2005)


        2002

        Interplay of surface reconstruction and surface electric fields in the optical anisotropy of GaAs(001)

        W.G. Schmidt, F. Bechstedt, W. Lu, J. Bernholc, Physical Review B (2002), 66, pp. 0855334


        1999

        Large-Scale SCI Clusters in Practice: Architecture and Performance in SCI

        J. Simon, A. Reinefeld, O. Heinz, in: SCI: Scalable Coherent Interface. Architecture and Software for High-Performance Compute Clusters, Springer, 1999, pp. 367-381


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