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Berlin 2012 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 45: Correlated Electrons: Poster Session

Donnerstag, 29. März 2012, 15:00–19:00, Poster B

15:00 TT 45.1 High-field magnetotransport study of YbRh2Si2 — •Naren HR, Sven Friedemann, Cornelius Krellner, Christoph Geibel, Frank Steglich, and Steffen Wirth
15:00 TT 45.2 Magnetic properties of Yb(Rh1−xCox)2Si2 with x=0.58 — •A. Haase, O. Stockert, C. Klingner, C. Krellner, S. Matas, M. Brando, C. Geibel, and F. Steglich
15:00 TT 45.3 Thermoelectric transport in Ce1−xLaxNi2Ge2 — •Ulrike Stockert, Adam P. Pikul, Nubia Caroca-Canales, Stefanie Hartmann, Christoph Geibel, and Frank Steglich
15:00 TT 45.4 The hidden order transition in URu2Si2 investigated by high-resolution angle-resolved photoemission spectroscopy — •Jan Trinckauf, Daniel Shai, John Harter, Torben Hänke, Graeme Luke, Kyle Shen, and Jochen Geck
15:00 TT 45.5 Quantum Criticality in Ta(Fe1−xVx)2 Probed by 51 V NMR and Magnetization — •Panchanana Khuntia, Michael Baenitz, Manuel Brando, Alexander Kerkau, Guido Kreiner, and Frank Steglich
15:00 TT 45.6 Inelastic Neutron Scattering on the heavy-fermion compound YbNi4P2 — •Zita Huesges, Oliver Stockert, Cornelius Krellner, Micheal Koza, Christoph Geibel, and Frank Steglich
15:00 TT 45.7 Annealing effects in the antiferroquadrupolar compound U(Pd1−xPtx)3 — •Dirk Schulze Grachtrup, Kerstin Westkämper, Markus Schäpers, Matthias Bleckmann, Stefan Süllow, and Keith A. McEwen
15:00 TT 45.8 Field-induced Quantum Critical Point in the heavy-fermion superconductor Ce2PdIn8 — •Jinkui Dong, Yoshi Tokiwa, Philipp Gegenwart, Shiyan Li, Daniel Gnida, and Dariusz Kaczorowski
15:00 TT 45.9 Theory of the Spin Exciton Formation inside the Hidden Order Phase of CeB6 — •Alireza Akbari and Peter Thalmeier
15:00 TT 45.10 Continuous unitary transformation of the single impurity Anderson model — •Jörn Krones and Götz S. Uhrig
15:00 TT 45.11 Mean-Field Theory of the Time-Dependent Kondo Effect — •Mohammad Sayad and Michael Potthoff
15:00 TT 45.12 Kondo Resonance for Orbitally Degenerate Systems — •Arthur Huber, Aljoscha B. J. Wilhelm, Michael Karolak, Tim O. Wehling, and Alexander I. Lichtenstein
15:00 TT 45.13 Numerical renormalization group calculation of total energies and specific heats of quantum impurity models — •Lukas Merker and Theo Costi
15:00 TT 45.14 Mechanism for Giant Thermopower in negative-U Molecular Quantum Dots — •Theo Costi, Sabine Andergassen, and Veljko Zlatic
15:00 TT 45.15 Distance dependence of the spin-spin correlation function of two Kondo impurities coupled to a one-dimensional Hubbard chain — •Alexander Tiegel, Piet Dargel, and Thomas Pruschke
15:00 TT 45.16 Hubbard-Holstein Model with Dispersive Phonons — •Patrick Haase, Sebastian Fuchs, and Thomas Pruschke
15:00 TT 45.17 Numerical Renormalization Group for dissipative quantum impurity systems — •Etienne Gärtner, Andrew Mitchell, and Ralf Bulla
15:00 TT 45.18 From periodic to dilute Anderson models: evolution of scales — •Lucas Hollender, Andrew Mitchell, and Ralf Bulla
15:00 TT 45.19 Non-Fermi liquid physics in two-channel Kondo models — •Andrew Mitchell
15:00 TT 45.20 Out-of-equilibrium steady state properties of the Bose-Fermi Kondo model — •Pedro Ribeiro and Stefan Kirchner
15:00 TT 45.21 Kondo regime of the non-equilibrium time evolution of an Anderson quantum dot — •Sebastian Bock, Denes Sexty, and Thomas Gasenzer
15:00 TT 45.22 Low-energy optics of Sr1−xCaxRuO3Diana Geiger, •Marc Scheffler, Martin Dressel, Melanie Schneider, and Philipp Gegenwart
15:00 TT 45.23 Quantum critical field and pressure tuning in the heavy fermion ferromagnet CeAgSb2 — •Peter Logg, Zhou Feng, Takao Ebihara, Patricia Alireza, Swee Goh, and F. Malte Grosche
15:00 TT 45.24 Single crystal growth of Yb(Rh1−xNix)Si2 : influence of chemical pressure and electron doping — •Elias Blumenröther, Hirale. S Jeevan, Yoshi Tokiwa, Maik Schubert, and Philipp Gegenwart
15:00 TT 45.25 Effect of hole doping and chemical pressure in Yb(Rh1−xFex)2Si2 — •Manuel Mchalwat, Hirale S. Jeevan, Yoshi Tokiwa, Maik Schubert, and Philipp Gegenwart
15:00 TT 45.26 Spin structure of Fe- and Co-substituted MnSi and MnGe — •Sven-Arne Siegfried, Dirk Menzel, Sergey Grigoriev, Vadim Dyadkin, Nadezhda Potapova, Evgeny Moskvin, Anatoly V. Tsvyashchenko, Mathias Kraken, and Jochen Litterst
15:00 TT 45.27 Magnetic order and Spin Dynamics in the Heavy Fermion System YbNi4P2 — •Johannes Spehling, Marco Günther, Nicholas Yéche, Hans-Henning Klauss, Hubertus Luetkens, Chris Baines, Cornelius Krellner, Christoph Geibel, and Frank Steglich
15:00 TT 45.28 Spin-wave excitations in antiferromagnetically ordered YbCo2Si2 — •O. Stockert, A. Haase, K. Schmalzl, N. Mufti, and C. Geibel
15:00 TT 45.29 Towards a complete preparation chain of single crystal intermetallic compounds under UHV compatible conditionsAndreas Bauer, •Ralitsa Bozhanova, Christian Franz, Saskia Gottlieb-Schönmeyer, and Christian Pfleiderer
15:00 TT 45.30 Compressible Quantum Critical Metamagnetistm — •Mario Zacharias, Indranil Paul, and Markus Garst
15:00 TT 45.31 Thermal expansion and magnetostriction of CePdAl single crystals — •Kai Grube, Sebastian Zaum, Veronika Fritsch, Sarah Woitschach, Oliver Stockert, and Hilbert v. Löhneysen
15:00 TT 45.32 Magnetic anisotropy of the Kondo lattice CePd1−xRhx probed with polarized neutrons — •Philipp Schmakat, Michael Schulz, Vladimir Hutanu, Manuel Brando, Christoph Geibel, Micha Deppe, Christian Pfleiderer, and Peter Böni
15:00 TT 45.33 Low-Dimensional Chiral Physics: Magnetic Catalysis — •Daniel David Scherer and Holger Gies
15:00 TT 45.34 Effects of dissipation on the phase transition of the disordered O(2) quantum rotor model — •Nicolas Lorscheid and Heiko Rieger
15:00 TT 45.35 Quantum Criticality in the pseudogap Kondo model: a dynamical large-N study — •Farzaneh Zamani, Pedro Ribeiro, and Stefan Kirchner
15:00 TT 45.36 Finite size scaling of the typical density of states using the kernel polynomial method — •Daniel Jung, Gerd Czycholl, and Stefan Kettemann
15:00 TT 45.37 With DFT and Ewald-summation to realistic parameters in molecular crystals — •Michael M. E. Baumgärtel, Andreas Dolfen, and Erik Koch
15:00 TT 45.38 The origin of magnetic and orbital order in K2CuF4 — •Guoren Zhang, Erik Koch, and Eva Pavarini
15:00 TT 45.39 Energy shifts in pump-probe resonant soft x-ray diffraction experiments — •Christian Schüßler-Langeheine, Christoph Trabant, and Niko Pontius
15:00 TT 45.40 X-ray Photon Correlation Spectroscopy Study of Phase Separation in Correlated Oxides — •Marcel Buchholz, Bo Shi, Christoph Trabant, Chun-Fu Chang, Michael Sprung, Vasco Tenner, Christian Gutt, Alexander Komarek, Enrico Schierle, Gerhard Grübel, Markus Braden, Jeroen B. Goedkoop, and Christian Schüßler-Langeheine
15:00 TT 45.41 Theoretical investigations on the magnetic properties of strongly correlated transition metal oxides — •J. Minar, S. Mankovsky, S. Bornemann, H. Ebert, and D. Ködderitzsch
15:00 TT 45.42 Low-temperature high-pressure optical investigation of the Mott-Hubbard insulator TiOCl — •Jihaan Ebad-Allah, Matthias Klemm, Siegried Horn, Michael Sing, Ralph Claessen, and Christine Kuntscher
15:00 TT 45.43 Long range order effects in the Mott-Hubbard transition and the Variational Lattice Approach — •Aljoscha Wilhelm, Christoph Jung, Hartmut Hafermann, and Alexander Lichtenstein
15:00 TT 45.44 (contribution withdrawn) Continuous-time quantum Monte Carlo investigation of the metallic state near a Mott insulator — •Junya Otsuki and Dieter Vollhardt
15:00 TT 45.45 Correlation functions of the spin-1/2 Heisenberg chain at finite temperature via functional equations — •Britta Aufgebauer and Andreas Klümper
15:00 TT 45.46 A numerical and an analytical approach to Chalker Coddington type network models — •Win Nuding, Michael Brockmann, Andreas Klümper, and Ara Sedrakyan
15:00 TT 45.47 Out of equilibrium energy dynamics in low dimensional quantum magnets — •Stephan Langer, Markus Heyl, Ian McCulloch, and Fabian Heidrich-Meisner
15:00 TT 45.48 Effective quantum dimer models for strongly correlated fermion systems — •Dominik Ixert and Kai Phillip Schmidt
15:00 TT 45.49 Properties of the Heisenberg two-leg Ladder using graph-based Continuous Unitary Transformations — •Johannes-Konstantin Splinter, Kris Cöster, and Kai Phillip Schmidt
15:00 TT 45.50 Comparison of TEBD and NRG methods for computing the nonequilibrium dynamics of nanosystems coupled to a bosonic bath — •Malcolm Einhellinger, Eric Jeckelmann, Sabine Tornow, and Gertrud Zwicknagl
15:00 TT 45.51 Projective approach to transport in weakly interacting 1-d fermionic quantum systems — •Christian Bartsch
15:00 TT 45.52 Possible gapless spin liquid in the Kagome Lattice — •Xue-Feng Zhang and Sebastian Eggert
15:00 TT 45.53 Supersolid phase transitions for hardcore bosons on a triangular latticeXue-Feng Zhang, •Raoul Dillenschneider, and Sebastian Eggert
15:00 TT 45.54 The Density Matrix Renormalization Group for spin-1/2-quantum chains: A demonstration program — •Thomas Köhler, Piet Dargel, and Andreas Honecker
15:00 TT 45.55 Lanczos algorithm with Matrix Product States for dynamical correlation functions — •Piet Dargel, Anton Wöllert, Andreas Honecker, and Thomas Pruschke
15:00 TT 45.56 cRPA study of a three band one-dimensional Hubbard model — •Michael Seißinger and Fakher F. Assaad
15:00 TT 45.57 QMC impurity solvers for two-particle Green's functions. — •Pavel Augustinský and Jan Kuneš
15:00 TT 45.58 Band structure engineering and vacancy induced metallicity at the GaAs-AlAs interface — •Mousumi Upadhyay Kahaly, Safdar Nazir, and Udo Schwingenschlögl
15:00 TT 45.59 Magnetic excitations in the diamond spin system Cu3(CO3)2(OH)2 probed by ESR — •Dmytro Kamenskyi, Mykhaylo Ozerov, Frederik Wolff-Fabris, Joachim Wosnitza, Sonia Francoual, Vivien Zapf, and Sergei Zvyagin
15:00 TT 45.60 NMR on the quasi two-dimensional antiferromagnet Ba(Ni1−xMgx)2V2O8 — •Dirk Waibel, Thomas Wolf, Hilbert v. Löhneysen, and Bernd Pilawa
15:00 TT 45.61 Atomically resolved images of lithium purple bronze — •Melanie Klinke, Robert Bienert, Michael Waelsch, Tatjana Podlich, Rongying Jin, and René Matzdorf
15:00 TT 45.62 Non-linear transport properties of pure, Rb- and W-doped blue bronze K0.3MoO3 — •Ali Khairi Al-Hadeethi, Dominik Grund, Song Yue, Martin Dressel, and Christine Kuntscher
15:00 TT 45.63 Thermal conductivity of the S = 1/2 two-leg spin-ladder compound bis(2,3-dimethylpyridinium) tetrabromocuprate (DIMPY) — •Gerhard Kolland, Johannes Engelmayer, Mark M. Turnbull, and Thomas Lorenz
15:00 TT 45.64 Magnetic ordering transitions of the effective XY-spin-1/2 compound Cs2CoCl4 in transverse magnetic fields — •Oliver Breunig, Eran Sela, Benjamin Buldmann, Markus Garst, Petra Becker, Ladislav Bohatý, Christian Dax, Ralf Müller, and Thomas Lorenz
15:00 TT 45.65 Phase diagram of the Ising chain compound Nb2O6 in transverse magnetic field — •Simon Scharffe, Oliver Breunig, Johanna Frielingsdorf, Martin Valldor, Michael Seher, and Thomas Lorenz
15:00 TT 45.66 Quasi one-dimensional spin chain materials AM2V2O8 — •Michael Seher, Sandra Niesen, Gerhard Kolland, Oliver Heyer, Simon Scharffe, Martin Valldor, and Thomas Lorenz
15:00 TT 45.67 NMR evidence for peculiar spin gaps in a doped S=1/2 Heisenberg spin chain — •Yannic Utz, Christian Rudisch, Franziska Hammerath, Hans-Joachim Grafe, Ashwin Mohan, Surjeet Singh, Romuald Saint-Martin, Alexandre Revcolevschi, Patrick Ribeiro, Christian Hess, Anja Wolter, Vladislav Kataev, Satoshi Nishimoto, Stefan-Ludwig Drechsler, and Bernd Büchner
15:00 TT 45.68 Thin film growth and characterization of the neutral-ionic phase transition system tetrathiafulvalene-p-chloranil — •Achim Rippert, Milan Rudloff, Kai Ackermann, and Michael Huth
15:00 TT 45.69 ESR studies of the quasi-2D antiferromagnet Cu(Pz)2(ClO4)2 — •M. Ozerov, J. Wosnitza, E. Čižmár, F. Xiao, M.M. Turnbull, C. P. Landee, and S.A. Zvyagin
15:00 TT 45.70 Cs2CuCl4−xBrx: perspectives of experimentally tunable frustration in a triangular lattice — •Kateryna Foyevtsova, Ingo Opahle, Harald O. Jeschke, and Roser Valentí
15:00 TT 45.71 Searching for the Power-Law Conductivity Inside the Mott Gap in κ-(ET)2Cu2(CN)3 — •Sebastian Elsässer, John A. Schlueter, and Martin Dressel
15:00 TT 45.72 Pressure-dependent resistivity measurements on the novel charge-transfer salt (BEDT-TTF)2Cu2Br3 — •Sebastian Köhler, Ulrich Tutsch, Friedhelm Isselbächer, Michael Lang, Frauke Schödel, Hans-Wolfram Lerner, and Matthias Wagner
15:00 TT 45.73 Critical behavior at the antiferromagnetic phase transition of Azurite — •P. T. Cong, B. Wolf, R. S. Manna, A. Brühl, S. Köhler, and M. Lang
15:00 TT 45.74 Surface Topology and Electronic Structure of Layered Strontium Ruthenates — •Robert Bienert, Melanie Klinke, Michael Waelsch, Sebastian Mietke, Jin Peng, Zhiqiang Mao, and René Matzdorf
15:00 TT 45.75 139La-NMR in the T-La2CuO4 antiferromagnetic phase — •Marco Günther, Katharina Weber, Hubertus Luetkens, Gwendolyne Pascua, Roland Hord, Barbara Albert, Lambert Alff, and Hans-Henning Klauß
15:00 TT 45.76 Magnetic Impurity with Generalized Couplings to Antiferromagnetic Heisenberg Chains — •Björn Willenberg, Jan Grelik, Wolfram Brenig, and Holger Frahm
15:00 TT 45.77 Spin diffusion in the Heisenberg Chain: a quantum Monte-Carlo study — •Yousef Rahnavard, Björn Willenberg, and Wolfram Brenig
15:00 TT 45.78 Helimagnets studied with neutron spin echo at RESEDA — •Jonas Kindervater, Wolfgang Häußler, Alexander Tischendorf, Andreas Bauer, Christian Pfleiderer, and Peter Böni
15:00 TT 45.79 Orbitons and bi-orbitons in GdVO3 and YVO3 — •Luis Fels, Michael Voigt, Komalavalli Thirunavukkuarasu, Eva Benckiser, Giacomo Ghiringhelli, Marco Moretti Sala, Graeme R. Blake, Nandang Mufti, Agung A. Nugroho, Thomas T. M. Palstra, Pasquale Marra, Krzysztof Wohlfeld, Jeroen. van den Brink, Maurits Haverkort, Thorsten Schmitt, and Markus Grüninger
15:00 TT 45.80 Ground state properties of antiferromatgnetic anisotropic S=1 Heisenberg spin chains — •David Peters
15:00 TT 45.81 Transport of an electron through a spin structure inside a quantum wire — •Christoph Hübner and Daniela Pfannkuche
15:00 TT 45.82 Thermal expansion investigation on EuB6 — •Rudra Sekhar Manna, Frank Schnelle, Mariano de Souza, Michael Lang, Pintu Das, Adham Amyan, Jens Müller, Stephan von Molnár, Peng Xiong, and Zachary Fisk
15:00 TT 45.83 Realization of a Setup for Ultrasonic Experiments under He-Gas Pressure and Test Measurements on MnF2 — •Sebastian Becker, Pham Thanh Cong, Bernd Wolf, and Michael Lang
15:00 TT 45.84 ESR spectrum of the spin-1/2 Heisenberg-Ising chain — •Michael Brockmann, Frank Göhmann, Michael Karbach, Andreas Klümper, and Alexander Weiße
15:00 TT 45.85 Interplay of structural and electronic properties in itinerant AFe4X2 systems — •Til Goltz, Nandang Mufti, Christoph Geibel, Theo Woike, Hubertus Luetkens, Johannes Spehling, and Hans-Henning Klauss
15:00 TT 45.86 Strong evidence against orbital fluctuations in RVO3 — •Julia Reul, Agung Nugroho, Thomas Palstra, and Markus Grüninger
15:00 TT 45.87 Skyrmions in two and three dimensional Dzyaloshinskii-Moriya magnets — •Stefan Buhrandt and Lars Fritz
15:00 TT 45.88 Magnetic structures and magnon dispersion of LaSrFeO4 — •N. Qureshi, H. Ulbrich, Y. Sidis, A. Cousson, and M. Braden
15:00 TT 45.89 Mott-Hubbard excitations in hole doped RTiO3 (R= rare earth ion or Y) studied via spectroscopic ellipsometry — •Ignacio Vergara, Julia Reul, Alexander Gössling, Alexander Komarek, and Markus Grüninger
15:00 TT 45.90 High-precision magnetisation measurements in pulsed fields — •Lars Postulka, Lukas Hinz, Bernd Wolf, and Michael Lang
15:00 TT 45.91 Ground-state energy and beyond: High-accuracy results for the Hubbard model on the Bethe lattice in the strong-coupling limit — •Martin Paech, Eva Kalinowski, Walter Apel, Gunther Gruber, Rita Loogen, and Eric Jeckelmann
15:00 TT 45.92 Strong dynamic correlations and Korringa Ratio of NaxCoO2 — •Lewin Boehnke and Frank Lechermann
15:00 TT 45.93 Perspectives of LDA+Slave-boson mean-field theory for realistic low-energy physics — •Christoph Piefke, Malte Behrmann, Sergej Schuwalow, and Frank Lechermann
15:00 TT 45.94 Bosonization approach to singular low-energy contributions in the thermodynamics of Fermi liquids — •Hendrik Meier, Catherine Pépin, and Konstantin Efetov
15:00 TT 45.95 Two-stage thermalization of weakly interacting quantum systems — •Michael Stark and Marcus Kollar
15:00 TT 45.96 Merging GW and dyanmical mean-field theory — •Ciro Taranto, Alessandro Toschi, Merzuk Kaltak, Martijn Marsman, Georg Kresse, and Karsten Held
15:00 TT 45.97 Symmetry properties of the U-matrix — •Hermann Ulm and Erik Koch
15:00 TT 45.98 Response functions of correlated materials — •Amin Kiani Sheikhabadi and Eva Pavarini
15:00 TT 45.99 Reduced Density Matrix Functional Theory- A suitable vehicle to import explicit correlations — •Ebad Kamil
15:00 TT 45.100 Vortex arrays in two-species Bose–Einstein condensates with interspecies attraction — •Pekko Kuopanportti, Jukka A. M. Huhtamäki, and Mikko Möttönen
15:00 TT 45.101 Quantum dynamics of few ultra-cold atoms in a periodically shaken double-well superlattice — •Martin Esmann, Niklas Teichmann, Jon Pritchard, and Christoph Weiss
15:00 TT 45.102 Viscosity of a two dimensional Fermi gas at strong coupling — •Carolin Küppersbusch, Lars Fritz, and Tilman Enss
15:00 TT 45.103 Search for Floquet states in many-body quantum systems — •Armin Seibert, Sergey Denisov, and Peter Hänggi
15:00 TT 45.104 Collective Excitations of Quantum Solid Phases — •Guenther Meissner and Uwe Schmitt
15:00 TT 45.105 Statistical properties of interacting Rydberg gases — •David Breyel and Andreas Komnik
15:00 TT 45.106 Embedded cluster approach for strongly correlated systems out of equilibriumMichael Knap, Anna Fulterer, Martin Nuss, Wolfgang von der Linden, and •Enrico Arrigoni
15:00 TT 45.107 Variational cluster approach for strongly correlated bosonic systems in and out of equilibrium — •Enrico Arrigoni, Benjamin Kollmitzer, Michael Knap, and Wolfgang von der Linden
15:00 TT 45.108 Characterization of Mott-insulating and superfluid phases in the one-dimensional Bose-Hubbard model — •S. Ejima, H. Fehske, F. Gebhard, K. zu Münster, M. Knap, E. Arrigoni, and W. von den Linden
15:00 TT 45.109 Instability of a repulsive Bose gas near the BEC transition — •Michael Maennel, Klaus Morawetz, and Pavel Lipavsky
15:00 TT 45.110 One-dimensional many-body quantum transport of Bose-Einstein condensates — •Julien Dujardin, Arturo Argüelles, and Peter Schlagheck
15:00 TT 45.111 Crystal Structure and Magnetic Properties of NaCu[(Cu3O)(PO4)2Cl]Teng-Teng Jin, Wei Liu, Shuang Chen, Yurii Prots, Walter Schnelle, Jing-Tai Zhao, Rüdiger Kniep, and •Stefan Hoffmann
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