Cooperative Phenomena

I. Quasi-particles and their Interactions.- Specific Editorial Introduction.- a) Some Problems about Polarons in Transition Metal Compounds.- b) Light Absorption by Electrons in Polar Crystals in a Strong Magnetic Field.- c) Properties of Crystals at High Concentration of Excitons.- d) Some Steady State Effects Associated with Electric Currents in Semiconductors.- e) The Free Energy and Dynamical Structure Factors of a Metallic System.- II. Superconductivity and Superfluidity.- Specific Editorial Introduction.- a) Electron-phonon Interactions and Superconductivity.- b) The Mechanism for Superconductivity-Twenty-Two Years Later.- c) Transition Temperatures of Superconductors.- d) The Effect of Stress on the Superconductivity of Tin.- e) Aspects of Condensation in 4He II.- f) The Derivation of Time-Dependent Ginzburg-Landau Equations in Superfluids.- g) Scattering of 4He Atoms by the Surface of Liquid 4He.- III. Dielectric Theory.- Specific Editorial Introduction.- a) Some Comments on the Dynamical Dielectric Constants.- b) Vibrational Absorption and Electronic Deformation in Solids.- c) Electrically Induced Stresses in Dielectric Fluids.- d) Dielectric Constant of Alkali Halide Crystals Containing OH? Substitutional Impurities.- IV. Reduced Density Matrices.- Specific Editorial Introduction.- a) Hypothetical Infinite Series Expressions of Reduced Density Matrices.- b) Towards a Generalized Ginzburg-Landau Equation.- c) Bose Condensation and Superfluid Hydrodynamics.- V. Phase Transitions.- Specific Editorial Introduction.- a) The Description of Thermodynamical Phases in Statistical Mechanics.- b) The Effect of Interatomic Potential on the Feature of Solid-Liquid Phase Transition.- c) The Effect of a Magnetic Field on Impurity Conduction in Semiconductors.- d)Relaxation Measurements on Single Crystals of MnCl2 · 4 H2O and MnBr2 · 4 H2O Near the Magnetic Phase Transition.- VI. Many-body Effects.- Specific Editorial Introduction.- a) The He Monolayer on Graphite.- b) Comments on Statistical Model and Collective Modes of Nuclei.- c) Classical Aspects of Spontaneous Emission.- d) Experiments and Theoretical Considerations Concerning the Dual Nature of Light.- e) Divergent Integrals in Scattering Theory.- f) Perturbation Methods and Lagrange's Expansion.- g) A Simple Lagrangian Formalism for Fermi-Dirac Quantization.- VII. Synergetic Systems.- Specific Editorial Introduction.- a) Synergetics-Towards a New Discipline.- b) Irreversibility and Dissipativity of Quantum Systems.- c) On the Possibility of Transport-Phase-Transitions in Phonon Systems.- d) Search for Cooperative Phenomena in Hydrogen-Bonded Amide Structures.- e) Behaviour of Interacting Protons: The Average-Mass Approach to their Study and their Possible Biological Relevance.- f) Ion Transport Across Cell Membranes.- g) Physical Relationships in Architecture.- VIII. Biographical and Scientific Reminiscences.- a) Biographical Notes.- b) Erinnerungen an die gemeinsame Arbeit mit Herbert Fröhlich.- c) Superconductivity and Superfluidity.- d) Some Reminiscences of Research in Liverpool in 1950.- e) Bibliographical Notes.