Table Of ContentCurrent Problems in
Condensed Matter
Current Problems in
Condensed Matter
Edited by
J. L. Moran-L6pez
Universidad Autonomade San Luis Potosi
San Luis Potosi, Mexico
Springer Science+Business Media, LLC
Library of Coogress Catalogiog-io-Publicatioo Data
OoOie
Proceedinp of an International Workshop on Current Problems in Condensecl Matter: Theory and
Experiment, held January 5-9, 1997, in Cocoyoc, Morelos, Mexico
ISBN 978-1-4757-9926-2 ISBN 978-1-4757-9924-8 (eBook)
DOI 10.10071978-1-4757-9924-8
O 1998 Springer Science+Business Media New York
Originally published by Plenum Press, New York in 1998
Softcover reprint of thc hardcover 1s t eclition 1998
http://www.plenum.com
10987654321
AU rights reserved
No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any
means, electronic, mechanical, photocopying, microfilming, recording, or otherwise, without written
pennission from the Publisher
Professor Karl Heinz Bennemann
Preface
This volume contains the papers presented at the International Workshop on the Cur
rent Problems in Condensed Matter: Theory and Experiment, held at Cocoyoc, More
los, Mexico, during January 5-9, 1997. The participants had come from Argentina,
Austria, Chile, England, France, Germany, Italy, Japan, Mexico, Switzerland, and
the USA. The presentations at the Workshop provided state-of-art reviews of many of
the most important problems, currently under study, in condensed matter. Equally
important to all the participants in the workshop was the fact that we had come to
honor a friend, Karl Heinz Bennemann, on his sixty-fifth birthday.
This Festschrift is just a small measure of recognition of the intellectualleadership
of Professor Bennemann in the field and equally important, as a sincere tribute to
his qualities as an exceptional friend, college and mentor. Those who have had the
privilege to work closely with Karl have been deeply touched by Karl's inquisitive
scientific mind as well as by bis kindness and generosity.
Professor Bennemann has contributed to the understanding of many important
issues in condensed matter. Most of the themes included in this volume have been of
bis interest. The volume begin8 with a set of papers on the physics of highly correlated
systems. A paper on high-Tc superconductors, one of his favorite problems, opens
the book. This paper is followed by others on magnetism and superconductivity,
intermediate valence systems, spin density waves, and Kondo insulators. Magnetism
is other of the issues at Karl's heart. Various aspects are presented, and in particular
various papers are devoted to the solution of the Hubbard and related models.
One of the most active fields of research in condensed matter is the study of
the physical properties of low-dimensional systems; surfaces, thin films, sandwiches,
heterostructures, two- and one-dimensional systems, and small aggregates. It has
been observed that the properties of these particular systems differ considerably from
those in the the two Iimits, atomic or molecular and the solid state. Karl has also
contributed to the understanding of a large number of properties of those systems. We
include various papers that address these important problems: molecular dynamics
studies of metallic and semiconductor clusters, electronic properties of fullerenes, and
magnetism of low dimensional-systems, within traditional and novel methods.
The surface properties of alloys and their capability to chemisorb atoms, as well
as vibrational modes in one-dimensional chains are also addressed in some chapters.
The calculation of the bulk properties of alloys and nonperiodic systems, in general,
are presented in the last chapters.
This volume is just a small sample of the large variety of problems that have been
of Karl's interest and that we have bad the opportunity and privilege to share with
him.
I wish to thank the participants for their enthusiasm and support in the real
ization of the Workshop. Special thanks go to the other members of the organizing
vii
viil Preface
committee: Professors Michel Avignon, Vijay Kummar, and Akio Okiji. I am particu
lary grateful to Dr. Alejandro Diaz-Ortiz, Dr. Juan Martin Montejano-Carrizales, and
Mr. Teodoro Cordova Fraga, for their invaluable assistance in the preparation of this
volume. Finally we acknowledge the financial support of Consejo Nacional de Ciencia
y Tecnologia (Mexico), Secretaria de Educaci6n Publica {Mexico), Sociedad Mexi
cana de Ffsica, Centro Latinoamericano de Fisica (Mexico), Universidad Aut6noma
de San Luis Potosi, Universidad Nacional Aut6noma de Mexico, and United Nations
Educational, Scientific, and Cultural Organization (Montevideo).
J. L. Monin-L6pez
San Luis Potosi, S.L.P., Mexico
Contents
Spin Fluctuation Effects in High-Tc Superconductors . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Sören Grabowski, Jörg Schmalian, and K.H. Bennemann
Superconductivity and Magnetism in f Electronic Systems 11
R. Escudero, F. Morales, A. Brigg, and P. Monceau
Intermediate Valence Model for ThMn20 27
7
C. I. Ventura and B. Alascio
Spin Density Waves in Dimerized Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
S. Caprara, M. Avignon, and 0. Navarro
Bond-Order-Wave verstts Spin-Density-Wave Dimerization in Polyacetylene . . . . 45
G. M. Pastor and M. B. Lepetit
lmpurity States in Kondo Insulators 53
P. Schlottmann
Reai-Space Ground-State of a Generalized Hubbard Model 73
0. Navarro, E. Flores, and M. Avignon
Coherent and Ultracoherent States in Hubbard and Related Models i9
K. A. Penson and A. I. Sal01non
What is Noncollinear Magnetism? 8i
P. Weinherger
Spectral Properties of Transition Meta} Compounds and Metal-lnsulator
Transition: A Systematic Approach within the Dynamical
Mean Field Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
P. Lombardo, M. Avignon, J. Schmalian, and K.H. Bennemann
Theoretical Study of the Metai-Nonmetal Transition in
Transition Meta) Clusters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
F. Aguilera-Granja, J. A. Alonso, and J. M. Montejano-Carrizales
First-Principles Langevin Molecular Dynamics Studies of Metallic and
Semiconductor Clusters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Luis C. Balbas
ix
X Contents
Theoretical Study of the Collective Electronic Excitations of the
Endohedral Clusters NaN@C7so oo oo o oo 133
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
JoMo Cabrera-Trujillo, R. Pis-Diez, Jo Ao Alonso, MOJO Lopez,
MoPo Ifiiguez, and Ao Rubio
Molecular Precursor of Soot and Quantification of the
Associated Health Risk 143
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
K. Siegmann and HoCo Siegmann
Magnetism of Transition Meta! Clusters: Overview and Perspectives 161
0 0 0 0 0 0 0 0 0
Go Mo Pastor
Magnetic Moments of Iron Clusters: a Simple Theoretical Model 177
0 0 0 0 0 0 0 0 0 0 0 0 0
Fo Aguilera-Granja, Jo Mo Montejano-Carrizales, and JoLo Monin-L6pez
Magnetic Anisotropy of 3d-Transition Meta! Clusters, Chains, and
Thin Fihns o o o oo o o oo 185
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Jo Dorantes-Davila and Go Mo Pastor
Noncollinear Magnetic Structures in Small Compact Clusters 195
MoAo Ojeda-L6pez, Jo Dorantes-Davila, and Go Mo Pastor
Phase Transitions in lsing Square Antiferromagnets:
A Contraversial System o oo o 203
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Eo L6pez-Sandoval, Fo Aguilera Granja, and Jo Lo Mon\n-Lopez
Interfacial Interdiffusion and Magnetic Properties of Transition Meta!
Based Materials o 209
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Mo Freyss, Do Stoeffier, So Miethaner, Go Bayrenther, and Ho Dreysse
Magnetic Surface Enhancement and the CurieTemperaturein lsing
Thin Films oo o o o o o o o oo 219
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
So Meza-Aguilar, Fo Aguilera-Granja, and Jo Lo Monin-L6pez
Conductivity Osci!lations in Magnetic Multilayers 227
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Miguel Kiwi, Ricardo Ramfrez, Ana Maria Llois, and Mariana Weissmann
Slave-Boson Approach to Electron Correlations and Magnetism in
Low-Dimensional Systems oo o oo o o o 239
0 0 0 0 0 0 0 0°0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Eo Muiioz-Sandoval, Jo Dorantes-Davila, and Go Mo Pastor
Segregation and Ordering at the Ni-10 ato% Al Surface from
First Principles o o o o o 24 7
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
To Co Schulthess and R. Monnier
Study of Deep Level Defects in Polycrystalline Cadmium Sulfide Films 255
Uo Pal, Ro Silva Gonzalez, Fo Donado, Mo Lo Henuindez, and
Jo Mo Gracia-Jimenez
Contents xi
Intrinsic Localized Modes in the Bulk and at the Surface of
Anharmonic Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
V. Bortolani, A. Franchini, and R. F. Wallis
Molectllar Orientation Dependence of Dynamical Processes on
Metal Surfaces: Dissociative Adsorption and Scattering,
and Associative Desorption of Hydrogen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
Ayao Okiji, Hideaki Kasai, and Wilson Agerico Difio
Gaps in the Spectra of Nonperiodic Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283
R. A. Barrio, Gerardo G. Naumis, and Chumin Wang
Electronic Theory of Colossal Magnetoresistance Materials . . . . . . . . . . . . . . . . . . . 291
R. Allub and B. Alascio
First-Principles Study of Phase Equilibria in the Ni-Cr System . . . . . . . . . . . . . . . 301
J .M. Sanchez and P. J. Craievich
Theoretical Aspects of Porous Silicon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
M. R. Beltran, C. Wang, M. Cruz, and J. Tagi.iefia-Martinez
The Principle of Self-Similarity and lts Applications to t.he Description
of Noncrystalline Matter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Richard Kerner
Ring Statistics of Glass Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339
Matthieu Micoulaut
GaAs Layers Grown by the Closed-Space Vapor Transport Technique
Using Two Transport Agents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . :J47
E. Gomez, R. Valencia, R. Silva, and F. Silva-Andrade
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
