JOURNAL OF LOW TEMPERATURE PHYSICS
Vol. 99, Nos. 3/4 May 1995
Special Issue: International Euroconference on
Magnetic Correlations, Metal-lnsulator-Transitions, and
Superconductivity in Novel Materials, University of Würzburg,
Würzburg, Germany, September 26-30, 1994
CONTENTS
Preface 185
W. Hanke, W von der Linden, and A. Muramatsu
EXPERIMENTAL FACTS
Spin and Charge Dynamics in Lightly Doped CuO and La2CuO4
from NMR, NQR,and mu+SR 187
F. Borsa, P. Carretta, F. Cintolesi, M. Corti, A. Lascialfari,
A. Rigamonti, F. C. Chou, and D. C. Johnston
Thin 3He Films on a Disordered Substrate: a Metal-lnsulator
Transition 191
A. Golov and F Pobell
Fermi Surface Instabilities and Unusual Spectral Properties in
Low-Dimensional Systems 195
M. Grioni, D. Malterre and Y. Baer
The Pairing Mechanism in HTSC Investigated by Electronic Raman
Scattering 201
A. Hoffmann, P. Lemmens, L. Winkeler, and G. Güntherodt
Raman Scattering by Electronic Excitations in Semiconductors and
in High Tc Superconductors 205
M. Krantz and M. Cardona
Non Fermi Liquid Ground States in Strongly Correlated f-Electron
Materials 223
M. B. Maple, M. C. de Andrade, J. Herrmann, Y Dalichaouch,
D. A. Gajewski, C. L. Seaman, R. Chau, R. Movshovich,
M. C. Aronson, and R. Osborn
Recent Advances in Raising Tc and Establishing the Gap-Symmetry
of High-Tc Cuprate Superconductors 251
H. R. Ott, D. A. Brawner, and A. Schilling
Light Scattering Mechanism in (Y/Pr)Ba2Cu3O7 Superlattices 263
E. Serman, R. Li, R. Feile, H. Adrian, and G. Jakob
Classification of Strongly Correlated f-Electron Systems 267
F. Steglich, C. Geibel, R. Modler, M. Lang, P. Hellmann,
and P. Gegenwart
ELECTRONIC PROPERTIES
Electrodynamic Response in Cuprate Superconductors 283
M. J. Graf and M. Palumbo
Non Fermi Liquid Behaviour in Semimetals. Applications to
the Fullerenes 287
F. Guinea, J Gonzalez, and M. A. H. Vozmediano
Infrared Properties of CuO-Superconductors 293
J. Keller and S. Kind
Optical Properties of Zhang-Rice States 299
J. Lorenzana
Spectral Functions for the 2D Hubbard Model 305
M. U. Luchini ancl D. M. Edwards
Hole Pockets in the Doped 2D Hubbard Model 311
A. Moreo and D. Duffy
Effect of Pair Fluctuations on the Electronic Properties of
the Negative Hubbard Model 315
J. J. Rodriguez-Nunez, S. Schafroth, R. Micnas,
T. Schneider, H. Beck, and M. H. Pedersen
MAGNETISM
Spiral Magnetism and Collective Excitations in Doped Hubbard
Models 319
W Brenig
Magnetic Impurity in a Luttinger Liquid: A View from Conformal
Field Theory 325
P. Fröjdh; and H. Johannesson
S0(3) Nonlinear sigma Model for a Spiral Phase in the
Spin-Fermion Model 329
S. Klee and A. Muramatsu
Quantum Disordered Phase in a Doped Antiferromagnet 333
C. Kübert; and A. Muramatsu
Spin Dynamics in High-Tc Copper Oxides 337
M. Lavagna, G. Stemmann, and C. Pepin
Interplane Relaxation and the Bilayer Coupling in Y2Ba4Cu7015 343
H. Monien and A. W. Sandvik
Ferromagnetism in Hubbard Models: Low Density Route 349
E. Müller-Hartmann;
Spin Fluctuations Beyond the Gutzwiller Approximation:
a Renormalized Paramagnon Theory 355
R. Raimondi and M. Lavagna
Quantum Fluctuations in Structurally Disordered Antiferromagnets 359
K Retzlaff and J. Richter
Ground-State Phase Relationships and Level Ordering for
Frustrated Quantum Antiferromagnets 363
J. Richter, N. B. Ivanov, A. Voight and K. Retzlaff
Quantum Phase Transitions in 2D Antiferromagnets 367
A. Sandvik and M. Vekic
On the Classification of the Low Energy Excitations in the
Doped Antiferromagnet 371
S. Sorella
The Spin-1/2 Heisenberg-Star with Frustration: Ground State
and Thermodynamics 381
A. Voigt, J. Richter and S. Krüger;
Exact Results on Ferromagnetism in Correlated Electron Systems 385
R. Strack and D. Vollhardt
VARIOUS ASPECTS OF STRONGLY CORRELATED ELECTRONS
Ward's Identity and the Suppression of Spin Fluctuation
Superconductivity 397
J. R. Schrieffer
The Normal and Superconducting States of the 2D Hubbard Model 403
J. Beenen and D. M. Edwards
Antiferromagnetic and van Hove Scenarios for the Cuprates:
Taking the Best of Both Worlds 409
E. Dagotto, A. Nazarenko, and A. Moreo
Extended Hubbard Models, Eta-Pairing and Supersymmetry 415
F. H. L. Essler
Hole Doping in Correlated CT-lnsulators: LiXNi(1-x)O 421
K Fauth, F. Reinert, P. Steiner, S. Hüfner;,
and H. Schmitt
Magnetism and Transport in the t-t'-J Model 425
H. Fehske and M. Deeg
Spin Excitations, Phonons and Phase Diagram in High-TC Cuprates 429
H. Fukuyama, H. Kohno, B. Normand, and T. Tanamoto
Critical Properties of Metal-Insulator Transition in
Low Dimensions 437
M. Imada
Numerical Evidence for Electron Decay in the Two-Dimensional
t-J Model 443
R. B. Laughlin
Fermi-Surface and Charge-Spin Excitations in Strongly
Correlated Electron Systems 467
S. Maekawa
Small Parameter for Migdal-Type Description of t-t'-J Model 473
S. Mukhin and L. J. de Jongh
Perturbative Expansions of the Half-Filled Kondo Lattice 477
N. M. Perez-Conde and P. Pfeuty
Exact Diagonalisation Studies of Strongly Correlated 2D
Lattice Fermions 481
D. Poilblanc
Insulating States of Correlated Electrons 487
D. J Scalapino, R. L. Sugar, R. Noack, S. R. White,
R. T. Scalettar, M. Vekic, and J. W. Cannon
Magnetism and Spin Liquid Behavior in a Two Layer Hubbard Model 499
R. T Scalettar
Why Do We Need Numerical Methods for Constrained Fermion Systems 505
M. Troyer and D. Würtz;
Spin-Charge Separation at Small Length Scales in the 2D t-J Model 509
R. Valenti and C. Gros
ELECTRON PHONON PHYSICS
Enhanced Electron-Phonon Coupling and Phonon-Plasmon Mixing
in the High Temperature Superconductors 513
C. Falter and M. Klenner
The Hubbard-Holstein Model 517
W. von der Linden, E. Berger, and P. Valasek
Effect of Antiferromagnetic Spin Fluctuations on the
Phonon-Mediated Pair Interaction in High-TC Superconductors 527
D. Manske, C. T. Rieck, and D. Fay
Phonons and Spin Excitations in the Extended t-J Model 531
B. Normand, H. Kohno and H. Fukuyama
Nonadiabatic Superconductivity: Electron Phonon Interaction
Beyond Migdal's Theorem 535
L. Pietronero, P. Benedetti, E. Cappelluti, C. Grimaldi,
S. Strässler;, and G. Varelogiannis
Charge Density Waves in an Electron Two-Level System Model 545
M. Ulmke and H. Müller-Krumbhaar;
SUPERCONDUCTIVITY
Effect of Pair-Breaking on the Superconducting Fluctuation
Contribution to the NMR Relaxation Rate 549
J. Appel and D. Fay
Effect of the Berezinskii-Kosterlitz-Thouless Vortex
Fluctuations on the Nuclear Spin Relaxation Rate 553
J. Appel, C. Timm, and A. Zabel
d-Wave Superconductivity in the t-J Model Using a Systematically
Improved Variational Monte Carlo Method 557
E. S. Heeb and T. M. Rice
Vortex Fluctuations in Two-Dimensional Superconductors
Above and Below the Berezinskii-Kosterlitz-Thouless Temperature 561
C. Timm
1D PHYSICS
Asymptotic Bethe-Ansatz Results for a Hubbard Chain with
1/sinh-Hopping 565
P. A. Bares and F. Gebhard
Symmetries and Pseudoparticle Transformations in 1D Non-Abelian
Quantum Liquids 571
J. M. P. Carmelo and N. M. R. Peres
Exotic Low-Energy Separation in 1D Quantum Liquids 577
J. M. P. Carmelo, A. H. Castro Neto, and D. K. Campbell
Impurity Scattering in Quantum Wires with Coulomb Interaction 583
M. Fabrizio, A. O. Gogolin, and S. Scheidl
Spin-Charge Separation and Anomalous Scaling in Coupled Chains 587
K Schönhammer;, V. Meden and P. Kopietz
Density Matrix Renormalization Group Calculations for Doped
Hubbard Ladders 593
S. R. White, R. M. Noack and D. J. Scalapino
NOVEL MANY-BODY TECHNIQUES
Consistent 1/N-Expansion for the Four-Slave-Boson Approach
with an Appropriate Operator-Ordering Prescription 599
E. Arrigoni and G. Strinati
Equation of Motion Approach to the Hubbard Model in Infinite
Dimensions 603
C. Gros, W. Wenzel, R. Valenti, and J. Stolze
New Approaches to the Anderson Lattice System 607
H. F. G. Keiter, T. Leuders, and P. Schönenberg;
Correlated Lattice Models in the Local Approximation--Aspects
of a Numerical Renormalization Group Treatment 611
T. Pruschke and R. Bulla
Functional Integrals for Correlated Fermions 615
H. J. Schulz
Slave Boson Theories of Correlated Electron Systems 625
P. Wölfle;
CONFERENCE PARTICIPANTS
637
Author Index for Volume 99, Numbers 3/4 647
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