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TT: Tiefe Temperaturen

TT 16: Posters Correlated Electrons, Measuring Devices, Cryotechnique

Samstag, 5. März 2005, 11:00–16:30, Poster TU C

11:00 TT 16.1 Quantum Criticality in the frustrated Laves phase compound NbFe2 — •Dennis Moroni-Klementowicz, Manuel Brando, and Friedrich Malte Grosche
11:00 TT 16.2 Finite-frequency transport properties of dimerized and frustrated spin-1/2 chains — •Fabian Heidrich-Meisner, Andreas Honecker, and Wolfram Brenig
11:00 TT 16.3 Systematic Strong-Coupling Expansion of the T⊗t Jahn-Teller System — •Heinz Barentzen
11:00 TT 16.4 Antiferromagnetic Quantum Chain Systems with Competing nn and nnn Interaction — •Reinhard K. Kremer
11:00 TT 16.5 S=1 ground state in a hexacopper(II) molecular complex — •Volodymyr Pashchenko, Michael Lang, Bernd Wolf, Bernhard Brendel, Norbert Auner, Olga Shchegolikhina, and Yulia Molodtsova
11:00 TT 16.6 The Influence of Disorder and Thermal Fluctuations on 1d Density Waves and Luttinger Liquids — •Thomas Nattermann und Andreas Glatz
11:00 TT 16.7 Tomonaga-Luttinger-liquid parameter from density-matrix renormalization group calculations — •Satoshi Ejima, Florian Gebhard, and Satoshi Nishimoto
11:00 TT 16.8 Influence of electronic correlations on the Drude response of two-dimensional organic conductors — •Natalia Drichko, Martin Dressel, Jaime Merino, and John Schlueter
11:00 TT 16.9 Tuning the Spin-State and Insulator-Metal Transition in LaCoO3 by Eu-Doping — •J. Baier, M. Kriener, S. Jodlauk, A. Reichl, C. Zobel, H. Kierspel, A. Freimuth, and T. Lorenz
11:00 TT 16.10 Possible resolution of a temperature profile: A spin-chain study — •Markus Henrich, Michael Hartmann, and Günter Mahler
11:00 TT 16.11 The Holstein-Hubbard Model away from Half-Filling — •Winfried Koller, Alex C. Hewson, and Dietrich Meyer
11:00 TT 16.12 Singular Dynamics of Underscreened Magnetic Impurity Models — •Winfried Koller, Alex C. Hewson, and Dietrich Meyer
11:00 TT 16.13 Quantenphasenübergang im spinlosen Holstein-Modell — •Steffen Sykora, Arnd Hübsch und Klaus W. Becker
11:00 TT 16.14 Dynamic charge and spin susceptibility of the Hubbard model — •Sebastian Schmitt and Norbert Grewe
11:00 TT 16.15 Electronic Phase Separation in La1−xSrxMnO3 films, x 1/8. — •Peter Wochner, U. Gebhardt, A. Vigliante, N. Kasper, J. Geck, H.U. Habermeier, and F. Razavi
11:00 TT 16.16 Anomaloos high ordering temperature in YbRu2Ge2 — •H. S. Jeevan, Z. Hossain, and C. Geibel
11:00 TT 16.17 Crossover from Single-Ion to Coherent Non-Fermi Liquid Behavior in Ce1−xLaxNi9Ge4 — •E.-W. Scheidt, U. Killer, H. Michor, S. Kehrein, and W. Scherer
11:00 TT 16.18 Thermal transport properties of YbRh2(Si1−xGex)2 at low temperatures — •Stefanie Hartmann, Adriana Sanchez, Silke Paschen, Octavio Trovarelli, Christoph Geibel, and Frank Steglich
11:00 TT 16.19 Tetracritical point in CeCu2(Si1−xGex)2 investigated by neutron diffraction — •Enrico Faulhaber, Oliver Stockert, Beatrice Grenier, Bachir Ouladdiaf, Micha Deppe, Christoph Geibel, Frank Steglich, and Michael Loewenhaupt
11:00 TT 16.20 Distribution of the Kondo temperature in strongly coupled two-level systems: an NRG study — •Christian Kolf
11:00 TT 16.21 Multi-level Kondo effect in single-wall carbon nanotubes (SWNT) — •Theresa Hecht, Michael Sindel und Jan von Delft
11:00 TT 16.22 Phase Transitions in the Pseudogap Anderson and Kondo models — •Lars Fritz, Marijana Kircan, and Matthias Vojta
11:00 TT 16.23 Magnetic field dependence of the electronic phase coherence length of diffusive nanowires with magnetic impurities — •Christian Schirm, Elke Scheer, Christian Paschke, Christoph Sürgers, and Hilbert v. Löhneysen
11:00 TT 16.24 Self-energy near Pomeranchuk instability — •Luca Dell’Anna and Walter Metzner
11:00 TT 16.25 Delocalization of electrons in disordered films induced by parallel magnetic field and film thickness — •R.K. Brojen Singh, V.Z. Cerovski, and M. Schreiber
11:00 TT 16.26 Density of states of the three dimensional Bernoulli-Anderson model — •P. Karman, V. Z. Cerovski, and M. Schreiber
11:00 TT 16.27 Metal-insulator transition in quasi-2D systems — •K. Morawetz
11:00 TT 16.28 Optical studies of the bandwidth controlled Mott-Hubbard transition in 2-dim organic charge transfer salts. — •Daniel Faltermeier, Michael Dumm, and Martin Dressel
11:00 TT 16.29 Metal-insulator transition in the Hubbard Model at finite doping and temperature — •Rolf Helmes, Achim Rosch, and Theo Costi
11:00 TT 16.30 The Role of Power-Law Correlated Disorder in the Anderson Metal-Insulator Transition — •A. Croy, V. Z. Cerovski, and M. Schreiber
11:00 TT 16.31 Hubbard model in a magnetic field at weak coupling — •Carsten Knecht and P.G.J. van Dongen
11:00 TT 16.32 Exact diagonalization studies of hole-doped spin rings — •Fatiha Ouchni and Jürgen Schnack
11:00 TT 16.33 Structural and magnetic investigations on new molecular quantum rings — •Volodymyr Pashchenko, Michael Lang, Bernd Wolf, Larisa Zherlitsina, Norbert Auner, Olga Shchegolikhina, and Yulia Pozdniakova
11:00 TT 16.34 Charge Transport Through Quench-Condensed Hydrogen Films — •Jörg Angrik, Patrick Schwinzer, Jürgen Klier, and Paul Leiderer
11:00 TT 16.35 Optical studies on the two-leg ladder compounds Sr14−xCaxCu24O41 under pressure — •S. Frank, R. Klingeler, B. Büchner, and C. A. Kuntscher
11:00 TT 16.36 NMR Untersuchungen der Spindiffusion in den Spinleitern von Sr14Cu24O41 — •A. Bosse, M.S. Rose, L. Shu, D.E. MacLaughlin, R. Klingeler, B. Büchner, F.J. Litterst und H.-H. Klauss
11:00 TT 16.37 Heat transport in S=1/2 spin ladders and chains — •C. Hess, P. Ribeiro, H. ElHaes, G. Roth, C. Sekar, G. Krabbes, B. Büchner, F. Heidrich-Meisner, W. Brenig, M. Hücker, U. Ammerahl, and A. Revcolevschi
11:00 TT 16.38 Triplet excitations of bond-disordered spin-1/2 ladders — •Marcelo Arlego, Wolfram Brenig, Daniel Cabra, Fabian Heidrich-Meisner, Andreas Honecker, and Gerardo Rossini
11:00 TT 16.39 Anisotropic thermal transport in one-dimensional spin systems — •K. Kordonis, T. Lorenz, A. Freimuth, Y. Ueda, M. Isobe, A. Vasil’ev, and S. Cheong
11:00 TT 16.40 The use of hydroquinone-derived linkers for the design of low-d spin systems: from isolated dimers to Heisenberg chains — •Bernd Wolf, Andreas Brühl, Jörg Magerkurth, Volodymyr Pashchenko, Bernhard Brendel, Michael Lang, Günter Margraf, Hans-Werner Lerner, Tonia Kretz, and Mathias Wagner
11:00 TT 16.41 Bosonization of dimerized Hubbard chains — •Carmen Mocanu, Peter Schwab, Michael Dzierzawa, and Ulrich Eckern
11:00 TT 16.42 Charge order in organic linear chain compounds investigated by ESR — •Belal Salameh, Michael Dumm , and Martin Dressel
11:00 TT 16.43 Optical spectroscopy of magnetic excitations — •E. Benckiser, M. Grüninger, T. Nunner, T. Kopp, C. Sekar, G. Krabbes, and A. Revcolevschi
11:00 TT 16.44 Interchain Coupling in Mixed-Spin Quantum-Ferrimagnets — •Simon Grossjohann, Andreas Honecker, and Wolfram Brenig
11:00 TT 16.45 Interplay between structure, magnetism and ordering phenomena in La2−xSrxCoO4 — •M. Cwik, M. Benomar, M. Haider, T. Lorenz, Y. Sidis, and M. Braden
11:00 TT 16.46 Transport and Thermodynamic Properties of RCoO3, R= La, Pr, Nd and Eu — •M. Kriener, K. Berggold, J. B aier, S. Jodlauk, H. Kierspel, T. Lorenz, M. Reuther, C. Zobel, and A. Freimuth
11:00 TT 16.47 The optical properties of charge ordered Fe3O4 — •Alexander Yaresko, Ivan Leonov, Victor Antonov, Michail Korotin, and Vladimir Anisimov
11:00 TT 16.48 Electrostatically driven charge ordering in Fe2OBO3 — •I. Leonov, A. N. Yaresko, V. N. Antonov, and V. I. Anisimov
11:00 TT 16.49 High-Energy Scattering Study of Charge and Orbital Order of Pr0.7(Ca0.9Sr0.1)0.3MnO3 under pressure — •S. Kiele, J. Geck, M. von Zimmermann, N. Wizent, B. Büchner, and M.M. Abd-Elmeguid
11:00 TT 16.50 Low temperature behaviour of Sr and Ca doped manganites — •E. Forzani, V. Moshnyaga, and K. Winzer
11:00 TT 16.51 The electronic structure of La1−xSrxTiO3+δ — •Alexander Gössling, Reinhard Rückamp, Holger Roth, Thomas Lorenz, and Markus Grüninger
11:00 TT 16.52 Comparison of X-ray absorption spectra of V2O3 at the O K edge to full multiple scattering calculations — •P. Pfalzer, J.-P. Urbach, J. Moosburger-Will, A. Nateprov, jr., M. Klemm und S. Horn
11:00 TT 16.53 Magnetic structure of DyBaCo2O5.5 — •H. Luetkens, H.-H. Klauss, A. Bosse, D. Cheptiakov, S. Streule, E. Pomjakushina, A. Podlesnyak, K. Conder, and P. Lemmens
11:00 TT 16.54 A Raman study of the charge-density-wave system A0.3MoO3 (A=K,Rb) — •D. M. Sagar, D. Fausti, P. H. M. van Loosdrecht, S. Yue, C. A. Kuntscher, M. Dressel, and S. van Smaalen
11:00 TT 16.55 Doping effects on the electrical properties of blue bronze K0.3MoO3 — •S Yue, C. A Kuntscher, M Dressel, S van Smaalen, F Ritter, and W Aßmus
11:00 TT 16.56 Doping and pressure dependence of the optical properties of quasi-one-dimensional LaTiO3.4 — •C. A. Kuntscher, K. Thirunavukkuarasu, S. Frank, I. Loa, K. Syassen, and F. Lichtenberg
11:00 TT 16.57 Electronic and vibrational properties of low-dimensional perovskite-related (Sr,La)NbO3.5−x — •C. A. Kuntscher, P. Haas, B. Gorshunov, M. Dressel, and F. Lichtenberg
11:00 TT 16.58 Optical and magnetic properties of low-dimensional perovskite-related (La,Ca)TiO3.4±δ — •K. Thirunavukkuarasu, F. Lichtenberg, and C. A. Kuntscher
11:00 TT 16.59 Ab-initio Phonons for the layered compound TiOCl — •Leonardo Pisani and Maria-Roser Valenti
11:00 TT 16.60 Quantenoszillationsexperimente an Θ-(BEDT-TTF)2I3 — •Axel Nothardt, Edurart Balthes, Belal Salameh, Wolfgang Schmidt, Dieter Schweitzer und Duncan Maude
11:00 TT 16.61 Untersuchungen von Schwebungsknoten bei Quantenoszillationsmessungen (dHvA und SdH) am (BEDT-TTF)4[Ni(dto)2] — •Wolfgang Schmidt, Axel Nothardt, Eduard Balthes und Dieter Schweitzer
11:00 TT 16.62 Electron Spin Resonance and Transport Measurements on the neat Organic Superconductor Θ-(BEDT-TTF)2I3 — •Belal Salameh, Axel Nothardt, Anja Much, and Dieter Schweitzer
11:00 TT 16.63 Pressure-induced dimensional crossover in the quasi-one-dimensional Mott-Hubbard insulator (TMTTF)2AsF6 — •A. Pashkin, M. Dressel, and C. A. Kuntscher
11:00 TT 16.64 Dynamic phonons and charge order in a quarter-filled ladder — •T. C. Lang, D. R. Neuber, M. Aichhorn, and H. G. Evertz
11:00 TT 16.65 Spin gap and charge order in weakly coupled quarter-filled ladders — •Bernhard Edegger, Hans Gerd Evertz, and Reinhard M. Noack
11:00 TT 16.66 Parent Hamiltonian for the SU(3) trimer chain — •Stephan Rachel, Dirk Schuricht, and Martin Greiter
11:00 TT 16.67 Microscopic theory of half-metallic double perovskites — •Nils Blümer, Carsten Knecht, Krunoslav Požgajčić und P. G. J. van Dongen
11:00 TT 16.68 Itinerant electron metamagnetism and weak ferromagnetism in LaCo9Si4 and YCo9Si4 — •H. Michor, S. Özcan, M. El-Hagary, E. Bauer, M. Reissner, G. Hilscher, S. Khmelevskyi, P. Mohn, P. Rogl, and H. Rosner
11:00 TT 16.69 Magnetic Ordering in Trigonal Chain Compounds — •Christian Laschinger, Udo Schwingenschlögl, Volker Eyert, Thilo Kopp, Raymond Frésard, and Ulrich Eckern
11:00 TT 16.70 Dimerization pattern or two-dimensional spin systems with spin phonon coupling in the adiabatic limit — •Carsten Aits, Ute Löw, and Andreas Klümper
11:00 TT 16.71 Incommensurate spin dynamics in underdoped cuprate perovskites — •Alexei Sherman and Michael Schreiber
11:00 TT 16.72 Structural properties of RETiO3 and Y1−xCaxTiO3 — •A. Komarek, H. Roth, T. Lorenz, W.D. Stein, M. Cwik, F. Bourée, A. Freimuth, and M. Braden
11:00 TT 16.73 Orbital excitations in transition-metal compounds — •R. Rückamp, A. Gössling, M. Grüninger, H. Roth, A. Freimuth, L. Jongen, A. Möller, G. Meyer, T.T.M. Palstra, A. Nugroho, and S.-W. Cheong
11:00 TT 16.74 Structural properties of Ca2−xSrxRuO4 — •O. Schumann, P. Steffens, R. Müller, G. Andre, P.G. Radaelli, P. Adelmann, S. Nakatsuji, Y. Maeno, and M. Braden
11:00 TT 16.75 Magnetic Field Dependence of Thermodynamic Properties of (Ca,Sr)2RuO4 — •J. Baier, T. Zabel, M. Kriener, P. Steffens, O. Schumann, O. Heyer, T. Lorenz, A. Freimuth, O. Friedt, M. Braden, A. Revcolevschi, S. Nakatsuji, and Y. Maeno
11:00 TT 16.76 Low temperature mixed spin state of Co3+ in LaCoO3 evidenced from local lattice distortions — •V. Gnezdilov, P. Lemmens, Yu.G. Pashkevich, K.-Y. Choi, S. Shiry aev, G. Bychkov, and S. Barilo
11:00 TT 16.77 Co3+ spin state transition detected by phonon Raman scattering in GdBaCo2O5.5 — •Yu.G. Pashkevich, V.P. Gnezdilov, P. Lemmens, B. Keimer, C. Ambrosch-D raxl, K.V. Lamonova, A.A. Gusev, K.-Y. Choi, S.N. Barilo, S.-V. Shiryaev, and G.-L. Bychkov
11:00 TT 16.78 Finite Temperature Properties of the 2D Kondo-Necklace — •Wolfram Brenig
11:00 TT 16.79 Orbital ordering in manganites in the band approach. — •Dmitri Efremov and Daniil Khomskii
11:00 TT 16.80 Single hole dynamics across magnetic order-disorder quantum phase transitions. — •Christian Brünger and Fakher Assaad
11:00 TT 16.81 The Kimball-Overhauser approach to the pair density of the 3D electron gas and Friedel-like phase-shift sum rules — •Paul Ziesche
11:00 TT 16.82 Quasiparticle bands of the ionic hubbard model — •Torben Jabben and Norbert Grewe
11:00 TT 16.83 Checkerboard Order in the projected SO(5) model — •Martin Jöstingmeier, Stephan Hochkeppel, Werner Hanke, and Shou-Cheng Zang
11:00 TT 16.84 Generalization of Luttinger-Ward Functional and the Extended Variational Cluster Approach — •Ninghua Tong and Ralf Bulla
11:00 TT 16.85 Dynamical local fields for quasiparticles — •Klaus Morawetz
11:00 TT 16.86 Time-Dependent Density Functional Theory of Disordered Metals — •V. G. Valeyev and O. Pankratov
11:00 TT 16.87 Full orbital LDA+DMFT scheme and its application to strongly correlated materials — •G. Keller, V. I. Anisimov, D. E. Kondakov, A. V. Kozhevnikov, I. A. Nekrasov, Z. V. Pchelkina, I. Leonov, X. Ren, and D. Vollhardt
11:00 TT 16.88 Self-consistent LDA+DMFT investigation of NiO — •X. Ren, I. Leonov, V. I. Anisimov, I. A. Nekrasov, G. Keller, and D. Vollhardt
11:00 TT 16.89 A hydrostatic pressure cell for precise resistivity measurement above 7 GPa at low temperatures in magnetic fields — •Takeshi Nakanishi
11:00 TT 16.90 Resonant soft x-ray diffraction to study electronic order — •C. Schüßler-Langeheine, J. Schlappa, A. Tanaka, C.-F. Chang, Z. Hu, M. Benomar, H. Ott, E. Schierle, E. Weschke, G. Kaindl, M. Braden, and L. H. Tjeng
11:00 TT 16.91 Status of the WERA Soft X-Ray Beamline at ANKA — •Eric Pellegrin, Peter Nagel, Bernd Scheerer, and Stefan Schuppler
11:00 TT 16.92 Strukturdynamik und thermisches Rauschen von optischen Komponenten für Gravitationswellendetektoren — •Anja Zimmer, Ronny Nawrodt, Sandor Nietzsche, Ralf Neubert, Matthias Thuerk, Wolfgang Vodel und Paul Seidel
11:00 TT 16.93 Neuartige Blei-Regeneratormaterialien für Kleinkältemaschinen im Temperaturbereich unterhalb 60 K — •Torsten Koettig, Stefan Moldenhauer, Matthias Thuerk und Paul Seidel
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DPG-Physik > DPG-Verhandlungen > 2005 > Berlin