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TT: Tiefe Temperaturen

TT 11: Postersitzung II (Metall-Isolator-Überg
änge, Phasenüberg
änge in Quantensystemen, Theorie: Systeme korrelierter Elektronen)

Tuesday, March 25, 2003, 14:30–19:00, P2c, P2d

14:30 TT 11.1 Modelling the metal-insulator transition in Eu-rich EuO — •Peter Sinjukow and Wolfgang Nolting
14:30 TT 11.2 Phasendiagramm von Ca2−xSrxRuO4 — •Paul Steffens, O. Friedt, M. Braden, T. Lorenz, J. Baier, P. Adelmann, G. Andre, S. Nakatsuji und Y. Maeno
14:30 TT 11.3 Charge ordering in Fe3O4 — •Ivan Leonov, Michael Korotin, Vladimir Anisimov, and Dieter Vollhardt
14:30 TT 11.4 A New Pressure Cell for Scattering Studies of Charge and Orbital Order — •Sven Kiele, Jochen Geck, Martin von Zimmermann, Bernd Büchner, and Mohsen M. Abd-Elmeguid
14:30 TT 11.5 Thermodynamische Eigenschaften von dotiertem LaCoO3 — •M. Kriener, J. Baier, M. Ben Omar, H. Kierspel, T. Lorenz, A. Reichl, T. Zabel, C. Zobel und A. Freimuth
14:30 TT 11.6 Thermische Ausdehnung und Magnetostriktion von TlCuCl3 — •N. Johannsen, T. Lorenz, A. Freimuth und A. Vasil’ev
14:30 TT 11.7 Bose-Einstein Kondensation für Hardcore Bosonen — •Christopher Moseley und Klaus Ziegler
14:30 TT 11.8 Metall–Isolator–Übergang in fermionischen Systemen mit klassischen Spins — •Cenap Ates, Karl-Heinz Höck und Klaus Ziegler
14:30 TT 11.9 Polaronen im E × β-Jahn-Teller-Modell — •Daniela Schneider, Karl-Heinz Höck und Klaus Ziegler
14:30 TT 11.10 Transporteigenschaften von La1−x(Eu, Sr, Ca)xCoO3 — •J. Baier, E. Abdelaziz, K. Berggold, C. Hanebeck, H. Kierspel, M. Kriener, T. Lorenz, A. Reichl, M. Zittartz, C. Zobel und A. Freimuth
14:30 TT 11.11 Charge and spin-dynamics in the quarter-filled ladder compound NaV2O5 — •Felicien Capraro and Claudius Gros
14:30 TT 11.12 Infrared spectroscopy of the Mott-Hubbard insulator to superconductor transition in κ-(ET)2Cu[N(CN)2]BrxCl1−x — •Jakob Barz, Michael Dumm, and Martin Dressel
14:30 TT 11.13 Superposition of the orbital quantization and Pauli effect in a charge-density-wave organic conductor α-(BEDT-TTF)2KHg(SCN)4 — •Mark Kartsovnik, Dieter Andres, Werner Biberacher, and Pavel Grigoriev
14:30 TT 11.14 Einfluss einer Ladungsdichtewelle auf den supraleitenden Zustand des organischen Metalls α-(BEDT-TTF)2KHg(SCN)4 — •Dieter Andres, Mark Kartsovnik, Werner Biberacher und Karl Neumaier
14:30 TT 11.15 Anomalous soft x-ray scattering: Spectroscopically-resolved structure studies — •C. Schüßler-Langeheine, E. Schierle, M. Haverkort, H. Ott, J. Schlappa, Z. Hu, A. Starodubov, M. Braden, G. Kaindl, E. Weschke, and L. H. Tjeng
14:30 TT 11.16 Experimental quest for orbitons in LaMnO3 — •R. Rückamp, M. Grüninger, C. Hilgers, A. Freimuth, P. Reutler, K.-Y. Choi, P. Lemmens, B. Büchner, G. Güntherodt, and A. Revcolevschi
14:30 TT 11.17 Minimal charge gap in the ionic Hubbard model — •Krunoslav Pozgajcic and Claudius Gros
14:30 TT 11.18 Nature of Band- to Mott-insulator Transitions in 1D — •Michael Sekania, Arno P. Kampf, George I. Japaridze, Holger Fehske, Philipp Brune, and Gerhard Wellein
14:30 TT 11.19 Electronic transport and structural properties of electronically correlated CuV2S4 — •R. Horny, S. Klimm, M. Klemm, S. Ebbinghaus, G. Eickerling, and S. Horn
14:30 TT 11.20 Spectroscopic investigation of the Spin-Peierls-like instability in TiOCl — •P. Lemmens, K.-Y. Choi, T. Sahaoui, A. Seidel, and F.C. Chou
14:30 TT 11.21 The projection-operator approach to the Kondo-lattice model — •Tilmann Hickel and Wolfgang Nolting
14:30 TT 11.22 Correlation and surface effects in Vanadium oxides — •Stephan Schwieger, Michael Potthoff, and Wolfgang Nolting
14:30 TT 11.23 Magnetism and electronic structure of Kondo-lattice films with finite band occupation — •Jochen Kienert and Wolfgang Nolting
14:30 TT 11.24 Cyclic Carbohydrates: Nanoscopic SQUIDs? — •Markus Himmerich, P. G. J. van Dongen, and R. M. Noack
14:30 TT 11.25 The modified perturbation treatment of the single impurity Anderson model and its application in dynamical mean-field theory. — •Claas Grenzebach and Gerd Czycholl
14:30 TT 11.26 Spektraldichten von lokalisierten Elektronen und Bandelektronen im spinlosen Falicov-Kimball-Modell — •Claudia Schneider und Gerd Czycholl
14:30 TT 11.27 Domain Walls in 1D Systems - Quantum and Finite Size Corrections — •Markus Lippert, Hans-Joachim Elmers, and Peter G. J. van Dongen
14:30 TT 11.28 Inhomogeneous Gutzwiller approximation with random phase fluctuations for the Hubbard model — •Götz Seibold, Jose Lorenzana, and Federico Becca
14:30 TT 11.29 The optimal inhomogeneity for superconductivity — •Enrico Arrigoni and Steven A. Kivelson
14:30 TT 11.30 Electronic structure of the coupled-tetrahedra quantum spin systems Cu2Te2O5Br2 and Cu2Te2O5Cl2 — •Roser Valenti, Tanusri Saha-Dasgupta, Claudius Gros, Helge Rosner, and Peter Lemmens
14:30 TT 11.31 Observation of a longitudinal magnon in the tetrahedral quantum spin system Cu2Te2O5Br2 — •Claudius Gros, P. Lemmens, M. Vojta, Roser Valenti, K. -Y. Choi, H. Kageyama, Z. Hiroi, N.V. Mushnikov, T. Goto, M. Johnsson, and P. Millet
14:30 TT 11.32 Spin-singlet nature of various dimerized cuprates. From ab-initio to experiment. — •Roser Valenti, T. Saha-Dasgupta, and Claudius Gros
14:30 TT 11.33 Ab-initio-Berechnung von abgeschirmten Coulomb-Matrixelementen — •Olaf Peschel, Ilan Schnell und Gerd Czycholl
14:30 TT 11.34 Metall-Isolator-Übergang und Instabilität der lokalen Sauerstoffumgebungen in VO2. — •Sven Surrey, Wei-Dong Yang und Karl-Heinz Höck
14:30 TT 11.35 Kondo Enhanced Anderson Localisation — •Stefan Kettemann and Mikhail Raikh
14:30 TT 11.36 Störungstheorie für das halbgefüllte Hubbard-Modell im Limes hoher Dimensionen — •Florian Gebhard, Eric Jeckelmann, Eva Kalinowski, Sandra Mahlert und Satoshi Nishimoto
14:30 TT 11.37 High-temperature series expansion for mixed-spin chains — •Noboru Fukushima, Andreas Honecker, and Wolfram Brenig
14:30 TT 11.38 Dynamical density-matrix renormalization-group method forcalculating spectral functions of impurity models. — •Satoshi Nishimoto, Eric Jeckelmann, and Florian Gebhard
14:30 TT 11.39 Optical conductivity of the Hubbard-model on the triangular lattice — •Marcus Renner and Wolfram Brenig
14:30 TT 11.40 Charge dynamics in the CuO double chains of PrBa2Cu4O8 — •Satoshi Nishimoto and Yukinori Ohta
14:30 TT 11.41 Multi-Band Gutzwillermethode für NiO — •Werner Weber, Stefan Weiser, Torsten Ohm und Jörg Bünemann
14:30 TT 11.42 Lattice-dynamics in quasi-1D-models with orbital ordering — •Andreas Friedrich and Wolfram Brenig
14:30 TT 11.43 Quadrumer phase of the crossed spin-chain model — •Wolfram Brenig and Matthias Grzeschik
14:30 TT 11.44 Heat and spin transport in one-dimensional spin-1/2 systems — •Fabian Heidrich-Meisner, Andreas Honecker, Daniel C. Cabra, and Wolfram Brenig
14:30 TT 11.45 Magnetic excitations in two-leg and four-leg spin ladders — •Tamara Nunner, Thilo Kopp, and Markus Grüninger
14:30 TT 11.46 Phase Diagram of the Ionic Hubbard Model — •Salvatore Manmana, Volker Meden, Reinhard Noack, and Kurt Schönhammer
14:30 TT 11.47 Quasi-particle bound states in inhomogeneously doped t-J bilayers — •Axel Grzesik, Simon Trebst, Hartmut Monien, and Manfred Sigrist
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