Electron-Electron Correlation Effects in Low-Dimensional Conductors and Superconductors

✍ Scribed by A. A. Ovchinnikov, I. I. Ukrainskii (auth.), Professor Dr. Alexandr. A. Ovchinnikov, Professor Dr. Ivan I. Ukrainskii (eds.)

• Publisher: Springer-Verlag Berlin Heidelberg
• Year: 1991
• Tongue: English
• Leaves: 169
• Series: Research Reports in Physics
• Edition: 1
• Category: Library

✦ Synopsis

Advances in the physics and chemistry of low-dimensional systems have been really magnificent in the last few decades. Hundreds of quasi-one-dimensional and quasi-two-dimensional systems have been synthesized and studied. The most popular representatives of quasi-one-dimensional materials are polyacethylenes CH [1] and conducting donor-acceptor molecular crystals TIF­ z TCNQ. Examples of quasi-two-dimensional systems are high temperature su­ perconductors (HTSC) based on copper oxides LA2CU04, YBa2Cu306+y and organic superconductors based on BEDT -TIP molecules. The properties of such one- and two-dimensional materials are not yet fully understood. On the one hand, the equations of motion of one-dimensional sys­ tems are rather simple, which facilitates rigorous solutions of model problems. On the other hand, manifestations of various interactions in one-dimensional systems are rather peculiar. This refers, in particular, to electron--electron and electron-phonon interactions. Even within the limit of a weak coupling con­ stant electron--electron correlations produce an energy gap in the spectrum of one-dimensional metals implying a Mott transition from metal to semiconductor state. In all these cases perturbation theory is inapplicable. Which is one of the main difficulties on the way towards a comprehensive theory of quasi-one-dimensional systems. - This meeting held at the Institute for Theoretical Physics in Kiev May 15-18 1990 was devoted to related problems. The papers selected for this volume are grouped into three sections.

✦ Table of Contents

Front Matter....Pages I-IX
Introduction....Pages 1-9
Front Matter....Pages 11-11
The 1-d Hubbard Model: A Landau Luttinger Liquid....Pages 12-22
Mean-Field Study of Possible Electronic Pairings in the CuO Plane of HTSO....Pages 23-31
Correlation Pairing and Antiferromagnetic Phase Energy in Low-Dimensional Systems of La-Sr-Cu-O and Y-Ba-Cu-O Metaloxides....Pages 32-40
Kink Nature of Current Carriers in High- T c Superconductor-Oxides....Pages 41-47
Anomaly Index and Induced Charge on a Noncompact Surface in an External Magnetic Field....Pages 48-53
About the Influence of Uniaxial Pressure on the Twin Structure in the 1-2-3 System....Pages 54-59
Front Matter....Pages 61-61
Coexistence of Mott and Peierls Instabilities in Quasi-One-Dimensional Organic Conductors....Pages 62-72
Nonlinear Optical Susceptibility for Third Harmonic Generation in Combined Peierls Dielectrics....Pages 73-79
Nonlinear Optical Properties of (A — B) x -Polymers....Pages 80-85
Application of the Method of Cyclic Permutations to the Calculation of Many-Electron Systems. Polaron States in Emery Model....Pages 86-92
From Incomplete Allowance for Electron Correlation to the Full CI in π -Systems. The Variational Operator Approach....Pages 93-99
Dynamical Correlation in Finite Polymethine Chains....Pages 100-105
Electronic Structure and Optical Spectra of Transition Metal Complexes via the Effective Hamiltonian Method....Pages 106-111
Front Matter....Pages 113-113
Magnetic Properties of the Hubbard Model with Infinite Interactions....Pages 114-120
Anomalous Transport Through Thin Disordered Layers....Pages 121-128
Correlation Effects in Many-Body Reactive Systems....Pages 129-134
Fermionization of a Generalized Two-Dimensional Ising Model....Pages 135-151
Ferromagnetism of Charge—Transfer Crystals: Curie Temperature of a Organometallic Ferromagnet....Pages 152-157
Back Matter....Pages 159-161

✦ Subjects

Condensed Matter Physics;Electronics and Microelectronics, Instrumentation;Atomic, Molecular, Optical and Plasma Physics