Atomic Scale Dynamics at Surfaces: Theory and Experimental Studies with Helium Atom Scattering

Description

Experimental advances in helium atom scattering spectroscopy over the last forty years have allowed the measurement of surface phonon dispersion curves of more than 200 different crystal surfaces and overlayers of insulators, semiconductors and metals. The first part of the book presents, at a tutorial level, the fundamental concepts and methods in surface lattice dynamics, and the theory of atom-surface interaction and inelastic scattering in their various approximations, up to the recent electron-phonon theory of helium atom scattering from conducting surfaces. The second part of the book, after introducing the experimentalist to He-atom spectrometers and the rich phenomenology of helium atom scattering from corrugated surfaces, illustrates the most significant experimental results on the surface phonon dispersion curves of various classes of insulators, semiconductors, metals, layered crystals, topological insulators, complex surfaces, adsorbates, ultra-thin films and clusters. The great potential of helium atom scattering for the study of atomic scale diffusion, THz surface collective excitations, including acoustic surface plasmons, and the future prospects of helium atom scattering are presented in the concluding chapters. The book will be valuable reading for all researchers and graduate students interested in dynamical processes at surfaces. Front Matter ....Pages i-xxvi Surface Dynamics, An Introduction (Giorgio Benedek, Jan Peter Toennies)....Pages 1-30 History of Surface Phonons and Helium Atom Scattering (Giorgio Benedek, Jan Peter Toennies)....Pages 31-55 The Physics of Surface Phonons (Giorgio Benedek, Jan Peter Toennies)....Pages 57-101 The Effect of the Surface Termination on Force Constants and Dispersion Curves (Giorgio Benedek, Jan Peter Toennies)....Pages 103-116 Theoretical Methods of Surface Dynamics (Giorgio Benedek, Jan Peter Toennies)....Pages 117-142 The Atom-Surface Potential (Giorgio Benedek, Jan Peter Toennies)....Pages 143-180 Theory of Atom Scattering from Surface Phonons: Basic Concepts and Temperature Effects (Giorgio Benedek, Jan Peter Toennies)....Pages 181-226 Theory of Atom Scattering from Surface Phonon: The Role of Electron-Phonon Interaction (Giorgio Benedek, Jan Peter Toennies)....Pages 227-252 Experimental Methods of HAS Surface Phonon Spectroscopy (Giorgio Benedek, Jan Peter Toennies)....Pages 253-304 Resonances and Critical Kinematic Effects (Giorgio Benedek, Jan Peter Toennies)....Pages 305-336 Experimental Results: Surface Phonons (Giorgio Benedek, Jan Peter Toennies)....Pages 337-440 Experimental Results: Vibrations of Adsorbates and Thin Films (Giorgio Benedek, Jan Peter Toennies)....Pages 441-486 Experimental Results: Beyond Single Phonons (Giorgio Benedek, Jan Peter Toennies)....Pages 487-548 Future (Giorgio Benedek, Jan Peter Toennies)....Pages 549-562 Back Matter ....Pages 563-625