Festkörperprobleme 14: Plenary Lectures Of The Divisions “semiconductor Physics”, “low Temperature Physics”, “metal Physics” Of The German Physical Society, Freudenstadt, April 1–5, 1974

FESTKORPERPROBLEME XIV ADVANCES IN SOLID STATE PHYSICS FESTKORPER PROBLEMEIIV ADVANCESIN SOLID STATE PHYSICS Plenary Lectures of the Divisions "Semiconductor Physics", '" Low Temperature Physics", "Metal Physics" of the German Physical Society, Freudenstadt, April 1-5, 1974 Edited by H. J. Queisser, Stuttgart With 179 figures Pergamon Vieweg Pergamon Press Ltd.0 Headington Hill Hall, Oxford OX30BW Pergamon Press Inc., Maxwell House, Fairview Park, Elmsford, New York 10523 Pergamon of Canada Ltd., 207, Queen's Quay West, Toronto 1, Canada Pergamon Press (Aust,) Ptv. Ltd., 19a Rushcutters Bay, Sydney, N.S.W. 2011 Friedr.Vieweg & Sohn Verlagsgesellschaft mbH, Burgplatz 1, D-33 Braunschweig, Germany-West 1974 All rights reserved © Friedr. Vieweg & Sohn Verlagsgesellschaft mbH, Braunschweig, 1974 Library o f Congress Catalog Card N o . 64-51891 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, Braunsehweig Printed in Germany-West ISBN 0 08 018206 2 Pe~g.~rh~7. ISBN 3 528 0 8020 5 Vieweg Foreword This v o l u m e comprises a selection from the invited papers delivered a t the spring meeting of the s o l i d state divisions of the G e r m a n Physical Society. C o n t r a r y t o tradition, semiconductor topics are not emphasized in anticipation o f the international semiconductor conference t o be held this s u m m e r a t Stuttgart. Optics, lattice dynamics, aspects o f metals, as well as utilization o f s o l i d s t a t e principles in o t h e r fields are a m o n g the subjects stressed here. Several papers dealt with applications in o r d e r to alert the audience, m o s t l y from academic institutions, a b o u t current trends in development w o r k . A prize for outstanding contributions t o solid state sciences has been d o n a t e d in h o n o r o f Waiter Schottky. This volume o p e n s with a n article by Andreas Otto, second recipient of this prize. The first winner, Peter Ehrhart, published his acceptance speech in the proceedings o f the 1973 H a m b u r g a u t u m n meeting; the present v o l u m e contains a more general review o f the work on interstitials a t Jiilich. The annual prize lecture o u g h t now to appear regularly in this series, w h i c h was initiated 20 years ago by Schottky himself, who continues to take active interest in our meetings and gives us appreciated advice. I t h a n k all authors for t h e i r efforts and gratefully acknowledge the s m o o t h cooperation with the publishers. Hans-Joachim Queisser Freudenstadt, A p r i l 1974 Contents Andreas Otto Experimental Investigation of Surface Polaritons on Plane Interfaces Herbert Weiss Utility and Futility of Semiconductor Effects 39 Donald N. Langenberg Characteristic Times in Superconductors 67 Peter Ehrhart, Heinz-GiinterHaubold, and Werner Schilling Investigation of Point Defects and Their Agglomerates in Irradiated Metals by 87 Diffuse X-Ray Scattering Ronald S. Hawke Experiments on Hydrogen a t Megabar Pressures; Metallic Hydrogen 111 Peter R . Selway, A . Richard Goodwin, and G. 1t. B. Thompson Heterostructure Injection Lasers 119 Horst Fischer Physics and Technology of Photovoltaic Solar Energy Conversion 153 Ludwig Genzel Aspects of the Physics of Microcrystals 183 I¢olfgang Gldser Experimental Studies of the Electron-Phonon Interac