This volume contains the proceedings of the Fourth International Conference on Phonon Scattering in Condensed Matter held from August 22-26, 1983 at the University of Stuttgart. The preceding conferences were organized at Saint Maxime and Paris in 1972, at the University of Nottingham in 1975, and at the Brown University Providence/Rhode Island in 1979. The Stuttgart conference, like the preceding conferences, was mainly con­ cerned with "propagating" high-frequency acoustic phonons, mechanical waves and heat up to the lattice limiting frequency. Lattice dynamics, optical pho­ nons, phase transitions, etc., were included as far as they are involved in acoustical phonon scattering, propagation and generation. In this context the conference covered all aspects of acoustical phonon physics, especially generation of phonons, propagation, scattering and detection. Since acoustic phonons participate in most energy-transfer processes in solids and liquids, the field of interest is growing rapidly. Therefore exciting new developments of acoustic phonon physics could be presented at the Stuttgart conference as well as important progress with respect to well-known problems, as, for example, the Kapitza resistance. Two hundred and six scientists from 21 countries attended the conference. Thirteen invited papers and 105 contributed papers, with 34 as posters, were presented. The discussions are included in this volume. A discussion session on large wave vector phonons was organized and chaired by V. Narayanamurti. A discussion session on phonon scattering at interfaces was organized and chaired by R.O. Pohl.

Inhalt

I Acoustic Phonon Spectroscopy.- Crossing Effects in Phonon Scattering.- Far Infrared Volume Generation and Detection of Phonons.- The Josephson Junction - A New Tunable Phonon Source with High-Frequency Resolution.- Two Applications of Microwave Acoustics in Liquid Helium: High Resolution Microscopy and Direct Measurement of Phonon Dispersion.- Heater Film Dynamics, Phonon Diffusion and Phonon Decay.- Infrared Excitation of High-Frequency Phonons by Multiphonon Absorption.- Zero-Field Hyperfine Splitting of Al2O3:V3+ by Josephson Phonon Spectroscopy.- Subnanosecond Bolometry Using Niobium Films.- Generation of High-Frequency Phonons by Metallic Point Contacts.- Nonequilibrium Phonon Distribution in a Quantizing Magnetic Field: A Tunable GHz to THz Phonon Generator?.- Relaxation Processes and Response Time of Superconductors to a Periodic Excitation.- Amplitude Modulated Heat Pulses.- Thermal Conductivity Measurement Under Applied Uniaxial Stress.- Thin Piezoelectric PVDF-Layers as Ultrasonic Transducers.- Discussions.- II Phonon Focusing.- Phonon Focusing in Germanium Imaged by Electron-Beam Scanning.- Nonlinear Phonon Focusing.- Phonon Focusing in Highly Dispersive and Isotopically Impure Crystals.- Spatial Variation of Phonon Distribution in Thermal Conduction.- Discussions.- III Large Wave-Vector Phonons.- Observation of a Quasi-Diffusive Phonon Propagation Mode.- Propagation of Near Zone Boundary Acoustic Phonons in Solid (hcp) 4He.- Scattering of Debye Phonons by Substitutional Defects in Solids.- Direct Observation of Ballistic Large-Wavevector Phonon Propagation in Gallium Arsenide.- Search for Large k-Vector Phonons in GaAs.- On the Propagation of Long-Lived Short Wavelength TA Phonons in GaAs.- Temperature Dependence of Optical Phonon Lifetimes.- Anharmonic Decay of High-Energy LA Phonons.- Lifetime and Linewidth of Resonant 40-cm?1 Phonons in Alexandrite.- High-Frequency Phonon Dynamics in LaF3 Using Monoenergetic Optical Detection Methods.- Raman Spin-Lattice Relaxation Induced by Optically Generated Zone-Boundary Phonons in Ruby.- Raman Probe of the Brillouin Zone for Nonequilibrium Phonons in GaAs.- Phonon Decay in X-Ray Irradiated Ruby Crystals.- Decay of a Highly Excited Phonon Mode.- Stimulated Emission and Decay of Phonons Resonant Between the Zeeman States of ?(2E) in Ruby.- Raman Scattering and the Two-Phonon Density of States in GaAs.- Propagation of Phonons Generated by Nonradiative Transitions in KCl-NO2?.- Discussions.- IV Surfaces, Interfaces, Kapitza Resistance.- Phonon-Induced Desorption of Helium.- Thermal Boundary Resistance Between Small Particles and Liquid He- 3.- Scattering and Absorption of Ballistic Phonons by the Electron Inversion Layer in Silicon: Theory and Experiment.- Low Wavevector Phonons in the 2-Dimensional Electron Solid on Liquid Helium.- Reciprocity Theorem for Phonon Transitions at Ideal Interfaces Within the Acoustic Mismatch Model.- Phonon Scattering by Twin Planes.- Boundary and Dislocation Scattering of Phonons in Lead Single Crystals.- Diffuse Scattering of Thermal Phonons at Crystal Surfaces.- Imaging of Specularly Reflected Phonons from a Crystal Boundary.- Critical-Cone Channeling of Thermal Phonons from Solid/Solid Interfaces.- Anomalous Low Temperature Kapitza Resistance of a Paramagnetic Salt.- A Size Effect in the Kapitza Resistance to Dilute 3He-4He Mixtures.- Kapitza Resistance Near 1 mK -The Shaking Box Model.- Phonon and Roton-Induced Evaporation.- Spectral Dependence of the Kapitza Resistance Between 0.5 K and 2.3 K.- Kapitza Resistance of Laser-Annealed Surfaces.- Discussions.- V Quantum Liquids and Crystals.- Crystallization Waves in Helium.- Phonon Transmission and the Kapitza Resistance Between Liquid and Solid Helium.- Transmission of Sound at the Solid-Liquid Interface of 4He.- Propagation of High Frequency Phonons in Liquid He II.- Ultrasonic Attenuation in KCl:OH? with High OH Concentration.- Localized Phonon Mode Associated with Dislocations in Alkali Halide Crystals.- 3He-3He Interaction in 3He-4He Liquid Mixtures Determined from Sound Attenuation.- Ultrasonic-Attenuation and Pressure Measurements in Phase-Separated Solid 3He-4He Mixtures.- Effects of Anharmonicities and Broken Time-Reversal Invariance on Static and Dynamic Properties of Two-Dimensional Electron Solids.- Charge-Induced Deformation of the 4He Solid-Superfluid Interface.- Pinning of Dislocations in Helium by Large Ultrasonic Stresses.- Discussions.- VI Cooperative Phenomena.- Ultrasonic Velocity and Attenuation Near the Cooperative Jahn-Teller Dilation in Cerium Ethyl Sulphate.- Ultrasonic Attenuation at Megahertz Frequencies in the Cooperative Jahn-Teller System TmVO4.- Thermoelectric Power of TiSe2?xSx Mixed Crystals.- Ultrasonic Study of Melting of Crystalline Solids.- Piezoacoustic Observation of Acoustic Soft Mode in KH2PO4 Crystal.- Brillouin-Scattering Study of Sound Velocity of Quartz at ?-? Transition.- Phonon-Soliton Interaction in K2SeO4.- Thermal Conductivity of Cooperative Jahn-Teller E-b1,b2 Systems.- VII Free Carriers.- Magnetic Field Dependence of Ultrasonic Attenuation in Heavily Doped Ge:Sb.- Phonon Attenuation in Heavily Doped p-Type Semiconductors.- Ballistic Phonon Transport in Ge:P Under Magnetic Field.- Hole-Phonon Interaction in Wurtzite-Type Semiconductors.- The Observation of Strongly Coupled Magnetic Ions in Al2O3 by Low Temperature Thermal Expansion Measurements.- Sound Velocity Measurements in Highly Oriented and Intercalated Graphite Specimen by Direct Electromagnetic Excitation of Ultrasound.- The Effect of Electron Relaxation on Damping of Long-Wavelength Phonons in Metals and Heavily Doped Semiconductors.- Nuclear Acoustic Resonance Measurements of the Electron-Phonon Interaction in bcc Transition Metals.- Revision of the Statistical Mechanics of Phonons to Include Phonon Linewidths.- Phonon Emission and Electron Heating in a Two-Dimensional Electron Gas.- Density and Field Dependence of the Phonon-Limited Hot-Electron Temperature in n-Si Inversion Layers.- Amplification of Total-Reflection-Mode Surface Phonons in n-Type InSb Films.- Time-Resolved Photoluminescence and Phonon Transport in Amorphous Si:H Films.- Surface Acoustic Waves in Metals.- Discussions.- VIII Defects.- Phonon Scattering by Dislocations.- The Acoustic Paramagnetic Resonance of Cr2+ in n-Type…