The Physics of Structural Phase Transitions

Minoru Fujimoto

277 pages, parution le 08/10/2004 (2^eme édition)

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Résumé

Phase transitions in which crystalline solids undergo structural changes present an interesting problem in the interplay between the crystal structure and the ordering process. This text, intended for readers with some prior knowledge of condensed-matter physics, emphasizes the basic physics behind such spontaneous structural changes in crystals.

Starting with the relevant thermodynamic principles, the book discusses the nature of order variables and their collective motion in a crystal lattice; in a structural phase transition a singularity in such a collective mode is responsible for the lattice instability, as revealed by soft phonons. This mechanism is analogous to the interplay of a charge-density wave and a periodically deformed lattice in low-dimensional conductors. The text also describes experimental methods for modulated crystal structures and gives examples of structural changes in representative systems.

The book is divided into two parts. The first, theoretical, part includes such topics as: the Landau theory of phase transitions; statistics, correlations and the mean-field approximation; pseudospins and their collective modes; soft lattice modes and pseudospin condensates; lattice imperfections and their role in the phase transitions of real crystals. The second part discusses experimental studies of modulated crystals using x-ray diffraction, neutron inelastic scattering, light scattering, dielectric measurements, and magnetic resonance spectroscopy.

Sommaire

Basic Concepts
- Thermodynamical Principles and the Landau Theory
- Order Variables, Their Correlations and Statistics : the Mean-Fields Theory
- Collective Modes of Pseudospins in Displacive Crystals and the Born-Huang Theory
- Soft Modes, Lattice Anharmonicity and Pseudospin Condensates in the Critical Region Dynamics of Pseudospins Condensates and the Long-Range Order
Experimental Studies
- Diffuse X-Ray Diffraction and Neutron Inelastic Scattering from Modulated Crystals
- Light Scattering and Dielectric Studies on Structural Phase Transitions
- The Spin-Hamiltonian and Magnetic Resonance Spectroscopy
- Magnetic Resonance Sampling and Nuclear Relaxation Studies on Modulated Crystals
- Structural Phase Transitions in Miscellaneous Systems

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	PAPIER
Éditeur(s)	Springer
Auteur(s)	Minoru Fujimoto
Parution	08/10/2004
Édition	2^eme édition
Nb. de pages	277
Format	16 x 24
Couverture	Relié
Poids	544g
Intérieur	Noir et Blanc
EAN13	9780387407166
ISBN13	978-0-387-40716-6