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Superconductivity in Ternary Compounds I Structural, Electronic, and Lattice Properties

Aus der Reihe Topics in Current Physics

51,99 €

inkl. gesetzl. MwSt., Versandkostenfrei

Beschreibung

Produktdetails

Einband

Taschenbuch

Erscheinungsdatum

05.12.2011

Herausgeber

O. Fischer + weitere

Verlag

Springer Berlin

Seitenzahl

286

Maße (L/B/H)

24,4/17/1,7 cm

Gewicht

535 g

Auflage

Softcover reprint of the original 1st ed. 1982

Sprache

Englisch

ISBN

978-3-642-81870-7

Beschreibung

Produktdetails

Einband

Taschenbuch

Erscheinungsdatum

05.12.2011

Herausgeber

Verlag

Springer Berlin

Seitenzahl

286

Maße (L/B/H)

24,4/17/1,7 cm

Gewicht

535 g

Auflage

Softcover reprint of the original 1st ed. 1982

Sprache

Englisch

ISBN

978-3-642-81870-7

Herstelleradresse

Springer-Verlag KG
Sachsenplatz 4-6
1201 Wien
AT

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  • Produktbild: Superconductivity in Ternary Compounds I
  • Produktbild: Superconductivity in Ternary Compounds I
  • 1. Superconducting Ternary Compounds: Prospects and Perspectives.- 1.1 Introduction.- 1.2 The Ternary Materials.- 1.2.1 The Ternary Molybdenum Chalcogenides (Chevrel Phases).- 1.2.2 The Ternary Rhodium Borides.- 1.2.3 Other Ternary Compounds.- 1.3 Concluding Remarks.- References.- 2. Chemistry and Structure of Ternary Molybdenum Chalcogenides.- 2.1 Overview.- 2.2 Preparation and Characterization.- 2.2.1 Preparation.- 2.2.2 Characterization: Chalcogenides MxMo6X8.- 2.3 Crystal Structure.- 2.3.1 Structural Parameters of MxMo6X8 Compounds.- 2.3.2 Crystal Structure.- 2.3.3 The Triclinic Phase.- 2.4 Relations Between Structure and Properties.- 2.4.1 Stabilization of Mo6S8.- 2.4.2 Mixed Anion: Substitution of Halogen for Chalcogen.- 2.4.3 Substitution on the Octahedral Cluster (Mo, Me)6 (Me = Nb, Ta, Re, Ru, Rh).- 2.4.4 Chalcogen-Chalcogen Substitution (S, Se, Te).- 2.4.5 Substitution of Oxygen for Sulphur.- 2.4.6 Addition of MMx? and Substitution of (M, M?) on an Element in the Channels.- 2.5 New Ternary Compounds Resulting from Linear Condensation of the Octahedral Mo6 Clusters.- 2.5.1 A New Cluster Mo9 in a Mo9X11 Unit (X = S, Se).- 2.5.2 A New Cluster Mo12 in a Mo12X14 Unit (X = S).- 2.5.3 New One-Dimensional Cluster (Mo6/2)?1 in the (Mo6/2X6/2)?1 Unit (X = S, Se, Te).- 2.6 Conclusion.- Appendix: Tables.- References.- 3. Structure and Bonding of Ternary Superconductors.- 3.1 Introductory Comments.- 3.2 Ternary Molybdenum Chalcogenides MMo6X8 (M: Metal, X: Chalcogen).- 3.2.1 Structure.- 3.2.2 Occurrence.- 3.2.3 Bonding.- 3.3 Ternary Molybdenum Chalcogenides Built Up by Condensed Mo3nX3n+2 Units (X = S, Se, Te).- 3.3.1 Structure.- 3.3.2 Occurrence.- 3.3.3 Bonding.- 3.4 Ternary Borides MT4B4 (M: Metal, T: Transition Element).- 3.4.1 CeCo4B4 Type (tP18, Tcmax = 12 k)3.- 3.4.2 LuRu4B4 Type (tI72, Tcmax = 11 K).- 3.4.3 LuRh4B4 Type (oC108, Tcmax = 6.3 K).- 3.4.4 NdCo4B4 Type (tP18, Tc < 4 K).- 3.4.5 Bonding of the MT4B4 Borides.- References.- 4. Metallurgy and Structural Transformations in Ternary Molybdenum Chalcogenides.- 4.1 Preparation Methods and Stoichiometry.- 4.1.1 Sintering.- 4.1.2 RF Melting Under High-Pressure Argon.- 4.1.3 Stoichiometry.- 4.2 High-Temperature Phase Fields in Some Selected Systems.- 4.2.1 The Binary System Mo-S.- 4.2.2 The System CuxMo6S8.- 4.2.3 The System CuxMo6Se8.- 4.2.4 The System Pb-Mo-S: PbxMo6S8?y or PbxMo6S8?.- 4.2.5 The Systems Ag-Mo-S, Ag-Mo-Se, Pb-Mo-Se, Sn-Mo-Se.- 4.3 Low-Temperature Relationships in CuxMo6S8 and CuxMo6Se8.- 4.3.1 Experimental Methods.- 4.3.2 The System CuxMo6S8.- 4.3.3 CuxMo6Se8.- 4.4 The Type of Formation of the Triclinic Phase in Ternary Molybdenum Chalcogenides.- 4.4.1 Existence of a Miscibility Gap in the Rhombohedral Phase.- 4.4.2 “Small” M Atoms: M = Ni, Zn, Co, Cr, Mn, Ti, V, Fe.- a) The Systems NixMo6Se8 and NixMo6S8.- b) The Systems ZnxMo6Se8 and ZnxMo6S8.- c) Ternary Molybdenum Chalcogenides with M = Co, Cr, Mn, Ti, V and Fe.- 4.4.3 “Large” M Atoms.- 4.5 Mechanism of Structural Transformations in Ternary Molybdenum Chalcogenides.- 4.5.1 The Delocalization of the M Atom.- 4.5.2 The Mechanism of Structural Transformations in MxMo6S8 Compounds (M = Cu, Fe,...).- a) Intrasite Mobility.- b) Metallurgical Arguments: Intersite Mobility.- 4.5.3 The Mechanism of Structural Transformations in Compounds with “Large” M Atoms.- 4.6 Superconductivity and Structural Transformations in Ternary Rhombohedral Compounds.- References.- 5. Thin-Film Ternary Superconductors.- 5.1 Preliminary Comments.- 5.2 Preparation and Structure.- 5.3 Critical Fields.- 5.4 Critical Currents.- 5.5 Electronic Properties.- 5.6 Final Statements and Conclusions.- References.- 6. Band Structures of MxMo6X8 — and M2Mo6X6-Cluster Compounds.- 6.1 General Considerations.- 6.2 Input to the Band-Structure Calculations.- 6.2.1 Crystal Structure.- 6.2.2 Atomic-Sphere Potentials.- 6.3 One-Electron States of a Single Mo6X8 Cluster.- 6.3.1 The X p States of a Regular Cube.- 6.3.2 The Mo d States of a Regular Octahedron.- 6.3.3 The d Bond Orbital of a Regular Octahedron.- 6.3.4 Mo-X Hybridization.- 6.3.5 Real Clusters.- 6.4 Energy Bands of Chevrel Phases.- 6.4.1 Gross Features of the Densities of States.- 6.4.2 Energy Bands Along the $$\bar 3$$-Axis from ? to R.- 6.4.3 The t1u and egd Levels at ?.- 6.4.4 The t2gd and egd Levels at R.- 6.4.5 The Conduction Band.- 6.4.6 Relation to Structural Properties.- 6.5 Energy Bands of Chain Compounds.- 6.5.1 General Features of the Energy Bands.- 6.5.2 Interpretation of the d-Band Structure.- 6.5.3 Physical Properties.- References.- 7. Phonons in Ternary Molybdenum Chalcogenide Superconductors.- 7.1 Preliminary Comments.- 7.2 The Molecular-Crystal Model and Lattice Heat Capacity.- 7.3 Phonon Spectra from Inelastic Neutron Scattering.- 7.3.1 The Theory of the Technique for Polycrystalline Samples.- 7.3.2 Experimental Neutron Scattering Results.- 7.4 A Simple Force-Constant Model for the Lattice Dynamics of Chevrel-Phase Compounds.- 7.4.1 Theoretical Considerations.- 7.4.2 Calculated Dispersion Curves.- 7.4.3 Calculated Phonon Densities of States.- 7.4.4 Calculated Neutron-Weighted Densities of States Comparisons.- 7.4.5 Relationship to Mössbauer Effect.- 7.4.6 Calculated Moments of the Phonon Spectrum.- 7.4.7 Calculated Lattice Entropy and Heat Capacity.- 7.5 Inelastic Neutron Scattering Experiments on Single Crystals.- 7.6 Relationship of the Phonon Spectrum to the Electron-Phonon Interaction.- 7.7 Summary.- References.- 8. Electron-Phonon Interaction in Chevrel-Phase Compounds.- 8.1 Introductory Remarks.- 8.2 Experiments on the Electron-Phonon Coupling.- 8.3 Theoretical Models for the Electron-Phonon Coupling.- 8.4 Isotope Effect of Tc in Mo6Se8 and SnMo6S8.- 8.4.1 The Isotope Effect.- 8.4.2 Sample Preparation.- 8.4.3 Results for the Isotope Effect Exponent.- 8.4.4 Discussion of the Measured Isotope Effect.- a) Mo6Se8.- b) SnMo6S8.- 8.5 Tunneling Spectroscopy on Cu1.8Mo6S8 and PbMo6S8.- 8.5.1 Tunneling Experiment.- 8.5.2 Junction Preparation.- 8.5.3 Results and Discussions.- 8.6 Conclusion.- References.