Glassy disordered systems [[electronic resource] ] : glass formation and universal anomalous low-energy properties / / Michael I. Klinger

• Autore: Klinger Michael I
• Pubblicazione: Singapore, : World Scientific, 2013
• Descrizione fisica: 1 online resource (340 p.)
• Disciplina: 620.1/44; 620.144
• Soggetto topico: Optics; Glass
• Soggetto genere / forma: Electronic books.
• Note generali: Description based upon print version of record.
• Nota di bibliografia: Includes bibliographical references and index.
• Nota di contenuto: Preface; CONTENTS; I. Fundamental Properties of Glasses; 1. General Description of Glasses and Glass Transition; 1.1. Metastability and disorder. Types of glasses; 1.2. Qualitative description of glass (liquid-to-glass) transition; 1.3. Kinetic and thermodynamic properties; 1.4. Slow relaxation processes; 2. Models of Glassy (Topologically Disordered) Structures; 2.1. Characteristics of glassy structures; 2.2. Homogeneous (ideal) models; 2.3. Inhomogeneous (cluster) models; 3. Some Theoretical Models of Glass Transition; 3.1. Vogel-Fulcher relation and "entropy crisis" ; 3.2. Role of configurational entropy, free-volume effects and "defects" diffusion3.3. Mode-coupling model: Dynamic liquid-glass transition; 4. Kohlrausch-William-Watt (KWW) Relaxation; 4.1. General features of slow relaxation processes; 4.2. Parallel-diffusion relaxation models; 4.3. Correlated, hierarchically constrained, relaxation models; 4.4. Concluding remarks; II. Anomalous Low-Energy Dynamics of Glasses; 5. Origin of Anomalous Low-Energy Properties of Glasses; 6. Experimental Background for Anomalous Low-Energy Atomic Dynamics; 6.1. Very low temperatures and frequencies ; 6.2. Moderately low temperatures and frequencies7. Soft-Mode Model of Low-Energy Atomic Dynamics; 7.1. Atomic soft modes and related potentials; 7.2. Probability distribution densities; 7.3. Low-energy excitations: Density of states and concentration; 7.4. Interaction of soft-mode excitations with acoustic phonons; 8. Soft-Mode Excitations of Very Low and "Intermediate" Energies; 8.1. Soft-mode tunneling states (independent two-level systems); 8.2. Soft-mode excitations of "intermediate" energies; 9. Tunneling States as Very Low Energy Limit Case ; 9.1. Standard tunneling model: Independent two-level systems9.2. Advanced tunneling model: Interacting two-level systems; 9.2.1. Mean-field approximation: "Spectral diffusion"; 9.2.2. Many-body effects: Collective excitations; 10. Soft-Mode Excitations of Moderately-Low Energies (Boson Peak); 10.1. Ioffe-Regel crossover for acoustic phonons as origin of boson peak; 10.2. Independent soft-mode vibrational excitations; 10.3. Total vibrational density of independent soft-mode states; 10.4. Generalization for interacting harmonic excitations ; 10.5. Total vibrational density of states: dynamic properties10.6. Width (attenuation) of acoustic phonons; 10.7. Thermal vibrational properties of glasses; 11. On Universal and Non-Universal Dynamic Properties of Glasses; 11.1. Very low temperatures and frequencies; 11.1.1. On universality of basic distributions in ATM; 11.1.2. On universality of soft-mode distribution inSMM; 11.2. Moderately low temperatures and frequencies; 12. Other Models for Glasses with High Frequency Sound; 12.1. Theoretical mode-coupling model; 12.2. Theoretical random-matrix model ; 12.3. Comparison with the soft-mode model
• Sommario/riassunto: The present book describes the fundamental features of glassy disordered systems at high temperatures (close to the liquid-to-glass transition) and for the first time in a book, the universal anomalous properties of glasses at low energies (i.e. temperatures/frequencies lower than the Debye values) are depicted. Several important theoretical models for both the glass formation and the universal anomalous properties of glasses are described and analyzed. The origin and main features of soft atomic-motion modes and their excitations, as well as their role in the anomalous properties, are conside
• Titolo autorizzato: Glassy disordered systems
• ISBN: 981-4407-48-8
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Lingua di pubblicazione: Inglese
• Record Nr.: 9910462803403321
• Lo trovi qui: Univ. Federico II