• A. Osterloh, L. Amico, and U. Eckern,

    Fermionic long-range correlations realized by particles obeying deformed statistics,

    J. Phys. A 33, L487 (2000) (cond-mat/0007081).

  • A. Osterloh, L. Amico, and U. Eckern,

    Solvability of Generalized Schulz-Shastry type models,

    Nucl. Phys. B 588, 531 (2000) (cond-mat/0003099).

  • K. Ziegler

    Condensation of a hard-core Bose gas

    Phys. Rev. A 62, 23611 (2000)

  • W. A. Atkinson, P. J. Hirschfeld, A. H. MacDonald, and K. Ziegler

    Details of Disorder Matter in 2D d-Wave Superconductors

    Phys. Rev. Lett. 85, 3926 (2000)

  • You-Quan Li and Ulrich Eckern,

    Theory for electrons with orbital degeneracy,

    Phys. Rev. B 62, 15493 (2000) (cond-mat/9911192).

  • S.-J. Gu, Y.-Q. Li, and H.-Q. Lin,

    Thermodynamics of Kondo Model with Electronic Interactions,

    J. Phys. A: Math. Gen. 33, 6799 (2000) (cond-mat/9905005).

  • You-Quan Li, S.J. Gu, Z.J. Ying, and U. Eckern

    One-dimensional model for doubly degenerate electrons,

    Phys. Rev. B 62, 4866 (2000).

  • R. Staudt, M. Dzierzawa, A. Muramatsu

    Phase diagram of the three-dimensional Hubbard model at half filling,

    Eur. Phys. J. B 17, 411-415 (2000).

  • N. B. Ivanov,

    Magnon dispersions in quantum Heisenberg ferrimagnetic chains at zero temperature,

    Phys. Rev. B 62, 3271 (2000) (cond-mat/0001441).

  • N. B. Ivanov and U. Schollwöck,

    Quantum Heisenberg ferrimagnetic chains,

    in Contemporary Problems in Condensed Matter Physics (Nova Publishers, New York, in press).

  • A. Osterloh, L. Amico, and U. Eckern,

    Bethe Ansatz solution of a new class of Hubbard-type models,

    J. Phys. A. 33, L87 (2000) (cond-mat/9812317).

  • M. Leadbeater, R. Raimondi, P. Schwab, and C. Castellani,

    Non-linear conductivity and quantum interference in disordered metals,

    EPJ B 15, 277-281 (2000) (cond-mat/9905240).

  • P. Schwab and C. Castellani,

    Comment on ``Metal-Insulator Transition of Disordered Interacting Electrons'',

    PRL 84, 4779 (2000).

  • P. Schwab,

    Persistent current in metals with a large dephasing rate,

    Eur. Phys. J. B 18, 189-192 (2000) (cond-mat/0005525).

  • Y.-Q. Li,

    Commutation relations in mesoscopic electric circuits,

    International Conference on Spin-Statistics Connection and

    Commutation Relations- Experimental Tests and Theoretical Implications,

    AIP conference proceedings Vol.552 (New York 2000), pp. 85-91 (cond-mat/0009352).

  • V. Eyert,

    Basic notions and applications of the augmented spherical wave method,

    Int. . Chem. 77, 1007-1031 (2000), Special Issue: Electronic Structure of Materials, edited by M. Defranceschi.

  • V. Eyert, R. Horny, K.-H. Höck, and S. Horn,

    Embedded Peierls instability and the electronic structure of MoO2,

    J. Phys.: Cond. Matt. 12, 4923-4946 ( 2000).

  • J. Augustin, V. Eyert, Th. Böker, W. Frentrup, H. Dwelk, C. Janowitz and R. Manzke,

    Electronic band structure of the layered compound Td-WTe2,

    Phys. Rev. B 62, 10812-10823 (2000).

  • V. Eyert and U. Eckern,

    Bandstruktur - Von der Quantenmechanik zum Materialdesign,

    Physik in unserer Zeit 31, 276-282 (2000).

  • A. Klein, S. Tiefenbacher, V. Eyert, C. Pettenkofer, and W. Jaegermann,

    Electronic properties of WS2 monolayer films,

    Thin Solid Films 380, 221-223 (2000).

  • I. Luck, V. Eyert, M. Fieber-Erdmann, E. Holub-Krappe, and R. Scheer,

    Investigations on the Emergence of the Bandgap Anomaly between II-VI and their analogous I-III-VI2 Compounds on the Basis of the Zn2-2xCuxInxS2 Solid Solution System,

    Jap. J. Appl. Phys. 39-1, 164-165 (2000).

  • S. F. Matar, F. Grasset, V. Eyert, and J. Etourneau,

    Local Spin Density Functional Investigation of the High Pressure Phase of Iron Monoxide,

    in: Ferrites: Proceedings of the 8th International Conference on Ferrites (ICF 8),

    edited by M. Abe and Y. Yamazaki,

    (The Japan Society of Powder and Powder Metallurgy, 2000), pp. 290-292.


  • S. Villain-Guillot, G. Jug, and K. Ziegler,

    Tails of Localized Density of States of Two-dimensional Dirac Fermions,

    to appear in Annalen der Physik (cond-mat/9908318).

  • M. Letz and K. Ziegler,

    Level Statistics and Localization for 2D Quantum Percolation,

    Phil. Mag. B 79 (3) 491-499 (1999).

  • G. Jug and K. Ziegler,

    Anomalous Frequency-Dependent Conductivity near the Quantum Hall Transition,

    Phys. Rev. B 59, 5738 (1999).

  • D. Bormann, H. Beck, O. Gallus, and M. Capezzali,

    Dynamics of the 2D two-component plasma near the Kosterlitz-Thouless transition,


  • D. Bormann, H. Beck, O. Gallus, and M. Capezzali,

    Anomalous vortex mobility and critical slowing down at the Kosterlitz-Thouless transition, preprint (August 99).

  • Y.-Q. Li and B. Chen,

    Quantum Theory for Mesoscopic Electric Circuits and its Applications,

    3rd IMASS/IEEE international multi conference CSCC99, Athens.

    Advances in Intelligent Systems and Computer Science (WSES press 1999) pp. 267-272 (cond-mat/9907171).

  • Y.-Q. Li, M. Ma, D.-N. Shi, and F.-C. Zhang,

    Ground State and Excitations of Spin Chain with Orbital Degeneracy,

    Phys. Rev. B 60 (1999) 12781-12787 (cond-mat/9902269).

  • V. Eyert, K.-H. Höck, S. Horn, A. Loidl, and P. S. Riseborough,
    Electronic structure and magnetic interactions in LiV2O4,
    Europhys. Lett. 46< /b>, 762-767 (1999) (cond-mat/9906194).
  • J. E. Han, O. Gunnarsson, and V. Eyert,
    Phonon line shape in disordered A3C60 (A=K, Rb),
    Phys. Rev. B 60, 6495-6501 (1999) (cond-mat/9902191).
  • P. C. Schmidt, V. Eyert, J. Sticht, and K. C. Mishra,

    Host Excitation and Luminescence in Large Band Gap Oxides,

    in: Luminescent Materials, edited by J. McKittrick, A. Kitai, K. Mishra, C. Ronda, and B. DiBartolo,

    Mat. Res. Soc. Symp. Proc. 560 (1999), in press.

  • C. Schuster and U. Eckern,

    Ground state properties of disordered and dimerized spin chains,

    Ann. Phys. (Leipzig) 9 (1999), 585-588.

  • R. Gade,

    An integrable sl(2|1) vertex model for the spin quantum Hall critical point,

    Phys. A: Math. Gen. 32 No 41 (15 October 1999) 7071-7082

  • R. Staudt, M. Dzierzawa, and A Muramatsu,

    Quantum Monte Carlo simulations of the three-dimensional Hubbard model,

    Ann. Phys. (Leipzig) 8 (1999) Spec. Issue, 249-252.

  • Y. Wang and U. Eckern,

    Scalar Potential Effect in an Integrable Kondo Model,

    Phys. Rev. B 59, 6400-6410 (1999) (cond-mat/9805322).

  • J.-H. Dai, Y. Wang, and U. Eckern,

    Ghost Spins and Novel Quantum Critical Behavior in a Spin Chain with Local Bond-Deformation,

    Phys. Rev. B 60, 6594-6600 (1999) (cond-mat/9808079).

  • Y. Wang, J.-H. Dai, F.-C. Pu, and U. Eckern,

    Enhancement of Pair Correlation in a One-dimensional Hybridization Model

    Phys. Rev. B 59, 7393-7400 (1999).


  • U. Eckern and K. Ziegler

    Transport in a nearly periodic potential with a magnetic field

    J. Phys.: Condensed Matter 10, 6749-6760 (1998).

  • C. Schuster and U. Eckern

    Interaction versus dimerization in one-dimensional Fermi systems

    Eur. Phys. J. B 5, 395-402 (1998).

  • L. Amico, A. Osterloh, and U. Eckern

    One-Dimensional XXZ Model for Particles Obeying Fractional Statistics

    Phys. Rev. B 58, R1703 (1998).

  • V. Eyert and K.-H. Höck

    The electronic structure of V2O5: Role of octahedral deformation

    Phys. Rev. B 57, 12727-12737 (1998).

  • V. Eyert, K.-H. Höck, S. Fiechter, and H.Tributsch

    Electronic structure of FeS2: The crucial role of electron-lattice interaction

    Phys. Rev. B 57, 6350-6359 (1998).

  • P. Schmitteckert, T. Schulze, C. Schuster, P. Schwab, and U. Eckern

    Anderson-localization versus delocalization of interacting fermions in one dimension

    Phys. Rev. Lett. 80, 560-563 (1998).

  • R. Gade

    Universal R-Matrix and graded Hopf algebra structure of Uq(gl(2|2))

    J. Phys. A 31 (1998) 4904 -4925.

  • K. Ziegler, M.H. Hettler and P.J. Hirschfeld

    Lower Bound for the Fermi Level Density of States of a Disordered D-Wave Superconductor in Two Dimensions

    Phys. Rev. B 57, 10825 (1998).

  • K. Ziegler

    Delocalization of 2D Dirac Fermions: the Role of a Broken Supersymmetry

    Phys. Rev. Lett. 80, 3113 (1998).

  • K. C. Mishra, B. G. DeBoer, P. C. Schmidt, I. Osterloh, M. Stephan, V. Eyert, and K. H. Johnson,

    Electronic Structures and Nature of Host Excitation in Borates,

    Ber. Bunsenges. Phys. Chem. 102, 1772-1782 (1998).


  • C. R. Werner and U. Eckern
    Non-linear conductivity of charge-density-wave systems
    Ann. Physik 6 (1997) 595-610
  • R. Gade
    On the Quantum Affine Superalgebra Uq(gl(2|2))
    Nuclear Physics B 500 [PM] (1997) 547-564
  • U. Eckern, G. Luciano, A. Tagliacozzo
    Dynamical mass of a quantum vortex in a Josephson junction array
    Phys. Rev. B 56, 14686-92 (1997)
  • D. Bormann
    Charge Transport in the Dense Two-Dimensional Coulomb Gas
    Phys. Rev. Lett. 78, 4324 (1997)
  • P. Schwab and U. Eckern
    Persistent current induced by magnetic impurities.
    Z. Phys. B 103, 97-103 (1997)
  • K. Ziegler and G. Jug
    Is the Peak value of sigmaxx at the Quantum Hall Transition Universal?
    Z.Physik B 104, 5 (1997)
  • G. Jug and K. Ziegler
    Characterization of the Local Density of States Fluctuations near the Integer Quantum Hall Transition in a Quantum Dot Array
    Phys. Rev. B 56, 9789 (1997)
  • K. Ziegler and A. Shukla
    Bose-Einstein Condensation in a Trap: the Case of a Dense Condensate
    Phys. Rev. A 56, 1438 (1997)
  • K. Ziegler
    One-Dimensional Interacting Random Walks in Random Environment
    in "Nonequilibrium Statistical Mechanics in One Dimension",
    ed. V. Privman (Cambridge University Press 1997)
  • K. Ziegler
    Scaling behavior and universality near the quantum Hall transition
    Phys. Rev. B 55, 10661 (1997)
  • K. Ziegler (without figures)
    Quantum Hall transition in an array of quantum dots
    Phys. Rev. B 55, 10602 (1997)
  • K. Ziegler, M. H. Hettler and P. J. Hirschfeld
    Reply to the Comment by A. A. Nersesyan and A. M. Tsvelik on "Nonzero Fermi Level Density of States for Disordered d-Wave Superconductors in Two Dimensions"
    Phys. Rev. Lett. 78, 3982 (1997)
  • S. Dieterle and K. Ziegler
    Recursive Treatment of One-Dimensional Interacting Random Walks
    Proceedings of Algoritmy '97


  • K. Ziegler, M. H. Hettler, and P. J. Hirschfeld
    Non-Zero Fermi Level Density of States for a Disordered d-Wave Superconductor in Two Dimensions
    Phys. Rev. Lett. 77, 3013 (1996).
  • P. Schmitteckert, P. Schwab, and U. Eckern
    Reply to the Comment by A.A. Zvyagin and H. Johannesson on our paper "Quantum Coherence in an Exactly Solvable One-dimensional Model with Defects".
    Europhys. Lett. 35, 153 (1996).
  • P. Schmitteckert and U. Eckern
    Phase Coherence in a Random One-Dimensional System of Interacting Fermions: A Density Matrix Renormalization Group Study.
    Phys. Rev. B - Brief Reports 53, 15397 (1996).
  • P. Schwab and U. Eckern
    Impurity Spin Dynamics and Quantum Coherence in Mesoscopic Rings.
    Ann. Phys. (Leipzig) 5, 57-87 (1996).
  • C. Kübert and A. Muramatsu
    Gauge Theory for a Doped Antiferromagnet in a Rotating Reference-Frame
    Int. J. of Mod. Phys. B, Vol. 10, No. 28, 3807-3826 (1996).
  • K. Ziegler
    Dirac Fermions with Disorder in Two Dimensions: Exact Results
    Phys. Rev. B 53, 9653 (1996).
  • K. Ziegler
    Functional Integration in Bose Systems with Hard-Core Interaction
    in ``Path Integrals: Dubna '96'', S. 305, Ed. V. S. Yarunin and M. A. Smondyrev.


  • U. Eckern and K.-H. Höck
    Elektronen -- fast so schwer wie Wasserstoff
    Physik in unserer Zeit 2/1995, pp. 83-87
  • U. Eckern and P. Schwab
    Normal Persistent Currents.
    Adv. Phys. 44, 387-404 (1995).
  • G. Luciano, U. Eckern, and J.G. Kissner
    Effect of external charges on the quantum superconductor - insulator transition in a Josephson junction array.
    Europhys. Lett. 32, 669-674 (1995)
  • G. Luciano, U. Eckern, J.G. Kissner, and A. Tagliacozzo
    Quantum vortex dynamics in a Josephson junction array frustrated by external charges
    J. Phys.: Condensed Matter 8, 1241-1255 (1996)
  • P. Schmitteckert, P. Schwab and U. Eckern
    Quantum Coherence in an Exactly Solvable One-dimensional Model with Defects.
    Europhys. Lett. 30, 543-548 (1995)
  • C. Kübert and A. Muramatsu
    Quantum disordered phase in a doped antiferromagnet.
    Europhys. Lett. 30, 481 (1995).
  • A. Angelucci
    Effective lattice actions for correlated electrons.
    Phys. Rev. B 51, 11580-11583 (1995)
  • A. Angelucci, S. Sorella and D. Poilblanc
    Large physical spin approach for strongly correlated electrons.
    Physics Letters A, Volume 198, Issue 2, 20 February 1995, pp. 145-150
  • M. Hettler and K. Ziegler
    Phase Transitions of Fermions Coupled to a Gauge Field: a Quantum Monte Carlo Approach
    Physica A 218, 461 (1995).
  • G. Forgacs and K. Ziegler
    An Exactly Soluble Model of Directed Polymers with Multiple Phase Transition
    Europhys. Lett. 29, 705 (1995).
  • K. Ziegler and A.M.M. Pruisken
    Incommensurate Phase on a Disordered Surface: Instability Against the Formation of Overhangs and Finite Loops
    Phys. Rev. E 51, 3359 (1995).
  • K. Ziegler
    Two-Dimensional Electrons in a Strong Magnetic Field with Disorder: Divergence of the Localization Length
    Europhys. Lett. 31, 549 (1995).


  • R. Bartussek, P. Hänggi, and J.G. Kissner
    Periodically Rocked Thermal Ratchets.
    Europhys. Lett. 28, 459-464 (1994).
  • T.A. Costi, P.Schmitteckert, J. Kroha, and P. Wölfle
    Infrared Divergences in the Kondo Problem.
    Physica C 235-240, 2287-2288 (1994).
  • T.A. Costi, P.Schmitteckert, J. Kroha, and P. Wölfle
    Numerical renormalisation group study of pseudo-fermion and slave-boson spectral functions in the single impurity Anderson Model.
    Phys. Rev. Lett. 73, No. 9, p 1275-1278 (1994) .
  • U. Eckern
    Superconductivity in restricted geometries
    Physica B 203, 448-453 (1994).
  • K. Ziegler
    Dilute System of Hard-core Bosons: a Soluble Limit
    Physica A 208, 177 (1994).
  • K. Ziegler
    Integer Quantum Hall Effect for Lattice Fermions
    Europhys. Lett. 28, 49 (1994).
  • K. Ziegler
    Comment on ``Critical Behavior of the Specific Heat in the Two Dimensional Site Diluted Ising System''
    Phys. Rev. Lett. 73, 3488 (1994).