Crystal Chemistry and Properties of Materials with Quasi-One-Dimensional Structures: A Chemical and Physical Synthetic Approach

ISBN-13: 9789027720573 / Angielski / Twarda / 1986 / 380 str.

Jean Rouxel; J. Rouxel

Opis

There is no doubt that in the development of the Physics and Chemistry of Solids during the last fifteen years, the very important place taken by low-dimensional compounds will be remembered as a major event. Dealing very widely at the beginning with two-dimensional structures and intercalation chemistry, this theme progressively evolved as the synthesis of one-dimensional conductors increased, along with the observation of their remarkable properties. Beyond the classical separation of the traditional disciplines, essential progress has stemmed each time from the concerted efforts of, and overlapping between, chemists, experimental physicists, and theoreticians. This book is a synthetic approach which aims to retrace these united efforts. The observation and characterization of charge density waves in their static or dynamic aspects have been the main points to attract the interest of researchers. Two broad categories of compounds have been the material basis of these observa tions: transition-metal polychalcogenides and either condensed-cluster phases or bronze-type compounds. These families are referred to throughout the various chapters of this book, thus illustrating the continuous progress of concepts in this domain and, at the same time, providing the first synthetic and exhaustive view of this group of materials."

Spis treści

An Approach to One-Dimensional Compounds.- 1. Structural considerations.- 2. 1D Structures for intercalation chemistry.- 3. 1D Materials as conductors.- 3.1. Nature and origin of instabilities.- 3.2. From Krogmann’s salts to NbSe3.- 3.3. Charge density wave depinning.- 4. Conclusion.- Orbital Interaction Analysis for the Electronic Structures of Low-Dimensional Solids.- 1. Introduction.- 2. Crystal structure and band orbital.- 2.1. Direct and reciprocal lattice.- 2.2. Band orbital formation.- 3. Peierls distortion.- 3.1. Band folding and splitting.- 3.2. First-order Peierls distortion.- 3.3. Second-order Peierls distortion.- 4. Low-dimensional solids.- 4.1. Structures derived from ML6 octahedra.- 4.2. Structures derived from ML6 trigonal prisms.- 4.3. Structures derived from ML8 tetragonal antiprisms.- 5. Concluding remarks.- Structural Studies of Phase Transitions in One-Dimensional Conductors.- 1. General aspects of phase transitions in condensed matter.- 1.1. Thermodynamic classification.- 1.2. Symmetry and order parameter.- 1.3. Elements of the phenomenological Landau theory.- 1.4. Fluctuations and correlations.- 2. Peierls instability of a one-dimensional metal.- 2.1. 2kF instability of a one-dimensional electron gas.- 2.2. Charge density waves, incommensurability.- 2.3. Precursor effects, Kohn anomaly.- 2.4. Interchain couplings.- 2.5. Beyond the independent electron picture and the mean-field treatment.- 3. Representative structural studies of one-dimensional conductors.- 3.1. Peierls transitions.- 3.2. Anion ordering transitions in the TMTS(T)F2X series.- 4. Concluding remarks.- Charge Density Wave Instability and Nonlinear Transport in the Quasi-One-Dimensional Blue Bronzes K0.30MoO3 and Rb0.30MoO3.- 1. Introduction.- 2. Structural aspects.- 3. Ohmic transport.- 4. Optical properties.- 5. Specific heat and lattice dynamics.- 6. Magnetic properties.- 7. Band structure and the Peierls transition.- 8. Nonlinear transport and related properties.- 8.1. Threshold electric field.- 8.2. High-frequency voltage oscillations.- 8.3. Frequency-dependent conductivity.- 8.4. Very low fequency phenomena.- 8.5. Other metastability phenomena.- 8.6. X-ray studies under electric field.- 8.7. Effects of irradiation on the nonlinear properties.- 8.8. Comparison between K0.30MoO3 and Rb0.30MoO3.- 8.9. Discussion.- 9. Conclusion.- New Transition Metal Halides and Oxides with Extended Metal—Metal Bonding.- 1. Introduction.- 2. Background.- 3. Infinite metal chains.- 3.1. Zig-zag chains and fused rhomboids.- 3.2. Chains of octahedra.- 3.3. Distortions in chains.- 3.4. Interstitial atoms in chains.- 4. Related sheet structures.- 5. General correlations.- 5.1. The metals and nonmetals involved.- 5.2. Bonding and bond orders.- 5.3. Interstitial atoms.- 5.4. Other electronic factors.- 6. Outlook.- Pseudo-One-Dimensional MX3 and MX4 Transition Metal Chalcogenides.- 1. Trichalcogenides of iva, va, and via elements.- 1.1. ZrSe3 structural type.- 1.2. TaSe3 structural type.- 1.3. NbSe3 structural type.- 1.4. Amorphous MX3 chalcogenides.- 1.5. Intercalation in trichalcogenides.- 2. FeNb3Se10: a new structural type.- 3. Tetrachalcogenides and related compounds.- 3.1. VS4 structural type.- 3.2. NbTe4 structural type.- 3.3. (NbSe4)3I structural type.- 4. Nb2Se9 and pentachalcogenides.- 4.1. Nb2Se9.- 4.2. Pentachalcogenides of group iva elements.- 5. Discussion and concluding remarks.- Pentachalcogenides of Transition Metals.- 1. Introduction.- 2. Preparation.- 3. Crystal structure.- 3.1. Basic structure.- 3.2. Structure modulation and polytype.- 4. Transport properties and related phenomena.- 4.1. Electrical resistivity.- 4.2. Hall effect.- 4.3. Thermoelectric power.- 4.4. Mechanism of transport anomalies.- 5. Band structure and Fermi surface.- 5.1. Band structure calculation.- 5.2. Schubnikov de Haas effect.- 6. Magnetic susceptibility.- 7. Raman scattering.- 8. Elastic anomaly and specific heat.- 8.1. Elastic anomaly.- 8.2. Specific heat.- 9. Pressure effect.- 10. Mixed systems.- From Three-Dimensional to One-Dimensional Cluster Mo6 Chalcogenides.- 1. Introduction.- 2. Principle of the cluster condensation in ternary Mo-chalcogenides.- 3. Metal—metal bonding approach in the Mo-cluster compounds.- 4. New Ternary Mo-Chalcogenides with discrete Mo6n clusters (n finite).- 4.1. Co-crystallization of Mo9X11 and Mo12X14 units with Mo6X8 units.- 4.2. Crystallization of only condensed units: Mo6nX6n + 2 units.- 5. Electronic properties and bond order.- 5.1. Theoretical electronic properties.- 5.2. Bond order.- 5.3. Electronic physical properties.- 6. New pseudo-one-dimensional $$({\rm Mo}_{6/2}{\rm X}_{6/2})_{\infty}^$$ infinite chain.- 6.1. Preparation.- 6.2. Structural description.- 6.3. Physical properties.- 7. Conclusion.- Index of Formulas.- Index of Names.- Index of Subjects.