Structures

Surface physics has experienced in the last two decades an explosive

expansion caused by the development and/or substantial improvement of

surface sensitive techniques and UHV apparatuses. It has grown into a maturefield of research, with data of the highest accuracy

and reproducibility. Surface physics is of great importance

for technological applications like field effect devices, molecular beamepitaxy, chemisorption and catalysis, corrosion, surface hardening

etc. The present volume III/24 is restricted to the so called
clean

surfaces, i.e. to surfaces atomically clean and well characterized, leaving the more complex field of the contaminated surfaces and overlayers to a

later occasion. Due to the large amount of data this volume is divided

into four subvolumes: III/24a, b, c, d (see below). Each

chapter consists of an introduction giving a brief presentation of the subject and a data section in form of tables, figures, and pictures. A general index in which all data are ordered alphybetically according to the material and to the surface is given at the end of subvolume III/24d.