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Dresden 2009 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 6: Postersession Correlated Electrons: (General) Theory, Low-Dimensional Systems, Kondo Physics, Heavy Fermions, Quantum-Critical Phenomena

Montag, 23. März 2009, 13:00–16:45, P1A

13:00 TT 6.1 Magnetic and electronic properties of double perovskites La2−xSrxCoIrO6 (0 ≤ x ≤ 1) — •Narendirakumar Narayanan, Robert Laskowski, Daria Mikhailova, Anatoly Senyshin, Peter Blaha, Karlheinz Schwarz, Helmut Ehrenberg, and Hartmut Fuess
13:00 TT 6.2 Novel unitary transformations to treat systems with quasiparticles of finite lifetimeTim Fischer, •Nils Drescher, Sebastian Duffe, and Götz S. Uhrig
13:00 TT 6.3 Nonequilibrium steady-state density of states of the Falicov-Kimball model in the presence of a large electric field — •Alexander Joura and Jim Freericks
13:00 TT 6.4 Charge transport in classical geometrically frustrated systems — •David Leipold and Erich Runge
13:00 TT 6.5 Matrix product state calculation of the correlation density matrix: an unbiased analysis of long-range correlations — •Wolfgang Münder, Andreas Weichselbaum, Jan von Delft, and Christopher Henley
13:00 TT 6.6 A fast impurity solver based on merging the equation of motion method and genetic algorithms — •Qingguo Feng, Yuzhong Zhang, and Harald O. Jeschke
13:00 TT 6.7 CDMFT and DCA with Lanczos solver — •giorgio sangiovanni, erik koch, and olle gunnarsson
13:00 TT 6.8 Superconductivity in the two-dimensional extended periodic Anderson model — •Nham Phan Van and Klaus W Becker
13:00 TT 6.9 Thermodynamics and transport properties of the single-band Hubbard model — •Ken Lichtner and Wolfgang Nolting
13:00 TT 6.10 Slyanin isomorphism and a correspondence between coordinate and functional Bethe ansatz — •Andreas Osterloh
13:00 TT 6.11 Antiferroquadrupolar phases in U(Pd1−xPtx)3, x≤ 0.01 — •Markus Schäpers, Matthias Bleckmann, Dirk Schulze Grachtrup, Stefan Süllow, and Keith McEwen
13:00 TT 6.12 Structural relaxation due to electronic correlations in the paramagnetic insulator KCuF3 — •Ivan Leonov, Nadia Binggeli, Dmitry Korotin, Vladimir I. Anisimov, Natasa Stojic, and Dieter Vollhardt
13:00 TT 6.13 Phonon renormalization from local and transitive electron-lattice couplings in strongly correlated systems — •Ernst von Oelsen, Andrea Di Ciolo, Jose Lorenzana, Marco Grilli, and Götz Seibold
13:00 TT 6.14 Calculation of thermoelectric properties by LDA+DMFT — •Philipp Wissgott, Philipp Hansmann, Nico Parragh, Alessandro Toschi, and Karsten Held
13:00 TT 6.15 Electronic structure of the low-dimensional transition metal oxyhalide VOCl — •Sebastian Glawion, Markus Scholz, Karin Goss, Michael Sing, Harald Jeschke, Tanusri Saha-Dasgupta, Roser Valenti, and Ralph Claessen
13:00 TT 6.16 Electronic properties of Fe, Mn, and Ni impurities in MgO thin filmsT. Haupricht, •Y.-Y. Chin, R. Gierth, J. Weinen, S. G. Altendorf, A. Hendricks, Z. Hu, J. Gegner, H. Fujiwara, D. Regesch, H. H. Hsieh, H.-J. Lin, C. T. Chen, and L. H. Tjeng
13:00 TT 6.17 Ultrasonic investigation of the quasi-2D quantum antiferromagnet Cs2CuCl4 — •A. Sytcheva, S. Zherlitsyn, J. Wosnitza, O. Chiatti, A. A. Zvyagin, and R. Coldea
13:00 TT 6.18 Effects of structural modulations on the quasiparticle distribution in 2H-TaSe2 — •Torben Hänke, Alexander Kordyuk, Volodymyr Zabolotnyy, Daniil Evtushinsky, Paul Sass, Christian Hess, Sergey Borisenko, Helmut Berger, and Bernd Büchner
13:00 TT 6.19 Low temperature magnetism of La1−xSrxCoO3 (x∼ 0.002) — •V. Kataev, A. Alfonsov, E. Vavilova, B. Büchner, A. Podlesnyak, M. Russina, A. Furrer, Th. Strässle, E. Pomjakushina, K. Conder, and D.I. Khomskii
13:00 TT 6.20 Collective two-particle excitations in cuprates and manganites: Resonant inelastic x-ray scattering and electron energy loss spectroscopy — •Jochen Geck, Roberto Krauss, Roman Schuster, Martin Knupfer, Patrick Ribeiro, Bernd Büchner, Pieter Glatzel, Javier Herrero-Martin, Joaquin Garcia-Ruiz, Diego Casa, Thomas Gog, Hiroki Wadati, and George A. Sawatzky
13:00 TT 6.21 Specific heat of a Cu3 spin tube — •Juergen Schnack and Roman Schnalle
13:00 TT 6.22 High Magnetic Field Measurements on single crystalline (5-MAP)2CuBr4 — •Daniela Rauch, Jan Kreitlow, Yurii Skourski, Mark M. Turnbull, and Stefan Süllow
13:00 TT 6.23 Specific heat of the highly anisotropic antiferromagnet [Cu(pyz)2(HF2)]PF6 — •R. Beyer, M. Uhlarz, J. Wosnitza, and J.A. Schlueter
13:00 TT 6.24 From solid to cluster – a computational study on the model compound Li2CuO2 — •Ulrike Nitzsche, Stefan-Ludwig Drechsler, and Helge Rosner
13:00 TT 6.25 Magnetic properties of the new low dimensional S=1/2 system: Cu(NO3)2 ·H2OM. Yehia, E. Vavilova, •V. Kataev, R. Klingeler, O. Volkova, E. Lapsheva, V. Shutov, O. Savelieva, A.N. Vasiliev, and B. Büchner
13:00 TT 6.26 Surface studies of charge-ordering transition metal oxides by means of scanning tunneling microscopyPaul Sass, •Dirk Bombor, Grzegorz Urbanik, Torben Hänke, Christian Hess, Bernd Büchner, Pascal Reutler, and Alexandre Revcolevschi
13:00 TT 6.27 Coupled spin S = 1 /2 dimer-systems based on nitronyl-nitroxide biradicalsCong T. Pham, Katarina Removic-Langer, •Bernd Wolf, Yulia D. Borzdina, Evgeny A. Mostovich, Martin Baumgarten, and Michael Lang
13:00 TT 6.28 Capacitive dilatometry under Helium-gas pressure — •Christian Balz, Andreas Brühl, Rudra Sekhar Manna, Bernd Wolf, and Michael Lang
13:00 TT 6.29 Magnetic-field dependence of the T*-anomaly in quasi-2D organic superconductorsJens Brandenburg, •Pintu Das, Jens Müller, Michael Lang, Franziska Weickert, Marek Bartkowiak und Jochen Wosnitza
13:00 TT 6.30 Multi-frequency ESR studies on (TMTTF)2X: evidence of the anisotropic Zeeman interaction in the charge ordered state — •S. Yasin, B. Salameh, M. Dumm, and M. Dressel
13:00 TT 6.31 Quantum-Phase-Transition within Density Functional Theory using exact Exchange-Correlation Potentials — •Martin Moch and Peter Schmitteckert
13:00 TT 6.32 Comparison of dynamics in quantum impurity models with bosonic and fermionic baths — •David Roosen, Karyn Le Hur, and Walter Hofstetter
13:00 TT 6.33 Dynamical correlation functions in the Ising model with a boundary — •Dirk Schuricht and Fabian H. L. Essler
13:00 TT 6.34 Quantum Monte Carlo results on phonon softening in the two-dimensional Holstein model — •Prabuddha Chakraborty, Richard Scalettar, and Warren Pickett
13:00 TT 6.35 Huge thermomagnetic and thermoelectric effects in Luttinger liquids and spin chains — •David Rasch, Arti Garg, Achim Rosch, and Efrat Shimshoni
13:00 TT 6.36 Quantum dots coupled to Luttinger liquid leads - conductance and charging — •Peter Wächter, Volker Meden, and Kurt Schönhammer
13:00 TT 6.37 Optical signatures of Kondo effect in quantum dotsHakan E. Türeci, Atac Imamoglu, Andreas Weichselbaum, •Markus Hanl, Theresa Hecht, and Jan von Delft
13:00 TT 6.38 Superperturbation solver for quantum impurity models — •Christoph Jung, Hartmut Hafermann, Sergey Brener, Mikhail Katsnelson, Alexei Rubtsov, and Alexander Lichtenstein
13:00 TT 6.39 Comparison between NRG and DMRG as impurity solver — •Robert Peters, Piet Dargel, and Thomas Pruschke
13:00 TT 6.40 Kondo model in and out of equilibrium: Functional RG at strong coupling — •Holger Schmidt and Peter Wölfle
13:00 TT 6.41 Correlation effects in the two-site Anderson model (TIAM) — •Torben Jabben
13:00 TT 6.42 Variational local moment approach to Kondo effect in the multi-orbital Anderson impurity model — •Anna Kauch and Krzysztof Byczuk
13:00 TT 6.43 Kondo screening cloud in the Anderson impurity model — •Andreas Holzner, Fabian Heidrich-Meisner, Ian McCulloch, Ulrich Schollwöck, and Jan von Delft
13:00 TT 6.44 The chaotic Kondo box: mean-field approach — •Sebastien Burdin, Rainer Bedrich, and Martina Hentschel
13:00 TT 6.45 Periodic time dependent Kondo modelMarkus Heyl and •Stefan Kehrein
13:00 TT 6.46 Continuous-Time Quantum Monte Carlo Approach to Strongly Correlated Nonlinear Transport — •Andreas Dirks, Thomas Pruschke, and Philipp Werner
13:00 TT 6.47 Uniaxial pressure effects on the superconductivity of CeCoIn5 — •Kai Grube, Sebastian Zaum, Roland Schäfer, Eric D. Bauer, Christoph Meingast, and Hilbert v. Löhneysen
13:00 TT 6.48 Coexistence of antiferromagnetism and superconductivity in Cd-doped CeCoIn5 — •O. Stockert, U. Witte, M. Nicklas, R. Schedler, K. Kiefer, J. D. Thompson, A. D. Bianchi, Z. Fisk, and F. Steglich
13:00 TT 6.49 Scanning Tunneling Spectroscopy studies on heavy fermion superconductors — •Stefan Ernst, Steffen Wirth, Hirale Jeevan, Christoph Geibel, Frank Steglich, and Zachary Fisk
13:00 TT 6.50 Magnetic field dependency of the spin wave excitation gap in UPt2Si2 — •Dirk Schulze Grachtrup, Matthias Bleckmann, Stefan Süllow, and John A. Mydosh
13:00 TT 6.51 Interplay between crystal-field splitting and Kondo-effect in CeNi9Ge4−xSix.Christian Gold, Ludwig Peyker, •Ernst-Wilhelm Scheidt, Wolfgang Scherer, and Herwig Michor
13:00 TT 6.52 Polarization dependent XAS on CeMIn5 (M=Co, Rh and Ir) and CePt3Si determines crystal-field ground state and sequence of states. — •T. Willers, A. Severing, Z. Hu, N. Hollmann, P.O. Körner, H.-J. Lin, C.T. Chen, D. Schmitz, E.D. Bauer, B. Fak, G. Lapertot, and L.H. Tjeng
13:00 TT 6.53 Ge based filled skutterudites MPt4Ge12: a 195Pt NMR study. — •M. Baenitz, R. Sarkar, R. Gumenik, A. Leithe-Jasper, W. Schnelle, H. Rosner, U. Burkhardt, M. Schmidt, U. Schwarz, Yu. Grin, and F. Steglich
13:00 TT 6.54 Possible crystal electrical field shift in the system CeNi9−xCuxGe4. — •Ernst-Wilhelm Scheidt, Ludwig Peyker, Christian Gold, Wolfgang Scherer, Ernst Bauer, Herwig Michor, Tobias Unruh, and Peter Link
13:00 TT 6.55 Low-temperature specific heat of the heavy-fermion superconductor CeCu2Si2 — •Julia Arndt, Oliver Stockert, Robert Borth, Thomas Lühmann, Hirale Jeevan, Christoph Geibel, Michael Loewenhaupt, and Frank Steglich
13:00 TT 6.56 Boron-induced change of valence state of Eu and structural phase transition in EuPd3Bx (0 ≤ x ≤ 0.55) — •Roman Gumeniuk, Claire Loison, Walter Schnelle, Wilder Carrillo-Cabrera, Paul Simon, Ulrich Burkhardt, Marcus Schmidt, Miriam Schmitt, Ulrich Schwarz, Helge Rosner, and Andreas Leithe-Jasper
13:00 TT 6.57 11B NMR study of the low dimensional Kondo lattice YbNiB4 — •Rajib Sarkar, Michael Baenitz, Arpana Prasad, Zakir Hossain, Frank Steglich, and Cristoph Geibel
13:00 TT 6.58 Strong electron correlations in FeSb2: An optical investigation and comparison with RuSb2 — •Alexander Herzog, Michael Marutzky, Jörg Sichelschmidt, Anders Bentien, Frank Steglich, Shin-Ichi Kimura, Simon Johnsen, and Bo Iversen
13:00 TT 6.59 121, 123 Sb magnetic resonance as a local probe for gap formation in FeSb2 — •Michael Baenitz, Andrei Gippius, Simon Johnsen, Bo Iversen, and Frank Steglich
13:00 TT 6.60 Quantum phase transition of the sub-Ohmic spin-boson model — •André Winter and Heiko Rieger
13:00 TT 6.61 Longitudinal magnon decay near a quantum critical point — •Lucas Hollender and Matthias Vojta
13:00 TT 6.62 A ’hidden disorder’ scenario for the low-temperature phase transitions in heavy-fermion compounds — •Tanja Rindler-Daller and Matthias Vojta
13:00 TT 6.63 Quantum Criticality of the Pomeranchuk Instability: Interplay of Multiple Dynamical Exponents — •Mario Zacharias, Markus Garst, Achim Rosch, and Peter Wölfle
13:00 TT 6.64 Emergent Lorentz symmetry with vanishing velocity in a critical two-subband quantum wire — •Matthias Sitte, Achim Rosch, Julia S. Meyer, Konstantin A. Matveev, and Markus Garst
13:00 TT 6.65 Thermal Expansion and Heat Transport of low-dimensional Magnetic Systems close to Quantum Criticality — •Jens Rohrkamp, Thomas Lorenz, Alexandr Sologubenko, Oliver Heyer, Markus Garst, Fabrizio Anfuso, Achim Rosch, Karl Krämer, and Mark Turnbull
13:00 TT 6.66 Quantum evolution from spin-gap to antiferromagnetic state in the frustrated J1-J2 system (CuCl1−xBrx)La(Nb1−yTay)2O7 — •Vladimir Gnezdilov, Peter Lemmens, Kwang-Yong Choi, and Hiroshi Kageyama
13:00 TT 6.67 Low frequency spin dynamics in the S=1/2 Heisenberg chain compound Cu(C4H4N2)(NO3)2 (CuPzN) measured by 13C- and 14N-NMR spectroscopy — •M. Günther, H. Kühne, H.-H. Klauß, M. Falkner, J. Litterst, S. Grossjohann, W. Brenig, A.P. Reyes, P.L. Kuhns, C.P. Landee, and M.M. Turnbull
13:00 TT 6.68 Quantum criticality in the quasi one-dimensional Ising spin-1/2 chain system BaCo2V2O8 — •Sandra Niesen, Martin Valldor, Oliver Heyer, and Thomas Lorenz
13:00 TT 6.69 Anisotropic length changes in Sr3Ru2O7 — •Christian Stingl and Philipp Gegenwart
13:00 TT 6.70 Quantum Criticality in CeMIn5-Systems Studied by Low-Temperature Thermal Expansion — •Jan Guido Donath, Philipp Gegenwart, Eric D. Bauer, John L. Sarrao, and Frank Steglich
13:00 TT 6.71 Low-temperature heat capacity of Yb(Rh0.93Co0.07)2Si2 — •Alexander Steppke, Niels Oeschler, Cornelius Krellner, Manuel Brando, Christoph Geibel, and Frank Steglich
13:00 TT 6.72 Pressure tuning of magnetism and superconductivity in CeCu2Si2 — •Koji Kaneko, Oliver Stockert, Julia Arndt, Astrid Schneidewind, Hirale S. Jeevan, Christoph Geibel, and Franck Steglich
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