Festkörperprobleme 17: Plenary Lectures Of The Divisions “semiconductor Physics” “metal Physics” “low Temperature Physics” “thermodynamics And Statistical Physics” “crystallography” “magnetism” “surface Physics” Of The German Physical Society Münster, March 7–12, 1977

FESTKORPERPROBLEME XVII ADVANCES IN SOLID STATE PHYSICS FESTKORPER PROBLEMEVXH ADVANCES IN SOLID STATE PHYSICS Plenary Lectures of the Divisions "Semiconductor Physics" "Metal Physics" "Low Temperature Physics" "Thermodynamics and Statistical Physics" "Crystallography" "Magnetism" "Su rface Physics" of the German Physical Society MLinster, March 7-12, 1977 Edited by J. Treusch, Dortmund With 233 figures Vieweg CIP-Kurztitelaufnahme der Deutschen Bibliothek Festkbrper-Probleme = Advances in solid state physics. Braunschweig: Vieweg. - NE: PT 1 7 . Plenary lectures of the divisions Semiconductor Physics, Metal Physics, Low Temperature Physics, Thermodynamics and Statistical Physics, Crystallography, Magnetism, Surface Physics of the German Physical Society, Miinster, March 7 - 1 2 , 1977 / ed. by J. Treusch. 1 . Aufl., 1 9 7 7 . ISBN 3-528-08023-X NE: Treusch, Joachim [Hrsg.]; Deutsche Physikalische Gesellschaft / Fachausschut~ Halbleiterphysik; Deutsche Physikalische Gesellschaft / Fachausschut~Metallphysik ISSN 0430--3393 1977 All rights reserved © Friedr. Vieweg & Sohn Verlagsgesellschaft mbH, Braunschweig, 1977 No part of this publication may be reproduced, stored in a retrieval system or transmitted, mechanical, photocopying, recording or otherwise, without prior permission of the copyright holder. Set by Vieweg, Braunschweig Printed by E. Hunold, Braunschweig Bookbinder: W. Langeliiddecke, Braunschweig Cover design: Barbara Seebohm, Braunschweig Printed in Germany-West ISBN 3 528 0 8 0 2 3 X Foreword V o l u m e XVII o f "Festk6rperprobleme/Advances in Solid S t a t e Physics" presents a selection o f invited papers delivered a t the Spring meeting of the Solid S t a t e Divisions o f the G e r m a n Physical Society in Mtinster, 1977. In contrast to the last issue t h e r e are several papers not dealing with semiconductors. Properties of the disordered state, including t o p i c s such as metallic glasses, t h e o r y of spin glasses, amorphous semiconductors and also liquid crystals, are described and show the conceptual bridges b e t w e e n different branches o f Solid S t a t e Physics. The m o d e r n t h e o r y of chemical b o n d i n g is treated in two reviews given by J. C. Phillips and W. A. Harrison. Optical properties and conductivity in semiconductors are treated as well as the interesting fields of channeling in solids, chemis o r p t i o n and magnetic ions in metals. Finally two papers are concerned with manufacture and use o f Integrated Circuits, showing the exciting development of this b r a n c h of applied research and development. The Walter S c h o t t k y Prize for outstanding contributions t o solid state sciences has been given to Dr. Siegfried Hunklinger, w h o s e article o n "Acoustic and Dielectric Properties of Glasses a t Low Temperatures" o p e n s this volume. I t h a n k all a u t h o r s for t h e i r efforts and gratefuUy acknowledge the exceedingly good cooperation with the publishers. D o r t m u n d , May 1977 Joachim Treusch Contents Siegfried Hunklinger Acoustic and Dielectric Properties of Glasses at Low Temperatures Wolfgang Helfrich Phases and PhaseTransitions of Liquid Crystals 13 Hans-J. Giintherodt Metallic Glasses 25 Kurt Binder Theory of Spin Glasses:A Brief Review 55 Roland Fischer Radiative Recombination in Amorphous Semiconductors 85 J. C. Phillips Modem Theories of Chemical Bonding in Crystals 109 Walter A . Harrison The Physics o f Solid State Chemistry 135 Eckard GerIach and Peter Grosse Scattering o f Free Electrons and Dynamical Conductivity 157 Dieter Bimberg Wannier-Mott Polaritons in Magnetic Fields 195