Alkali-doped fullerides : narrow-band solids with unusual properties / / Olle Gunnarsson

• Record Nr.: UNINA9910809093603321
• Autore: Gunnarsson Olle
• Pubbl/distr/stampa: River Edge, N.J., : World Scientific, c2004
• ISBN: 1-281-93543-3; 9786611935436; 981-279-495-6
• Edizione: [1st ed.]
• Descrizione fisica: 1 online resource (xvii, 282 p. ) : ill
• Disciplina: 537.623
• Soggetti: Superconductors; Superconductivity; Electric conductivity; Metal-insulator transitions; Electron-electron interactions; Electron-phonon interactions; Jahn-Teller effect
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Bibliographic Level Mode of Issuance: Monograph
• Nota di bibliografia: Includes bibliographical references (p. 261-277) and index.
• Nota di contenuto: ch. 1. Structural properties. 1.1. Structure of the C[symbol] molecule. 1.2. Structures of some solids -- ch. 2. Models and parameters. 2.1. Models of hopping. 2.2. Coulomb interaction. 2.3. Electron-phonon interaction. 2.4. Electron-plasmon coupling. 2.5. Current operator -- ch. 3. Phonons and electron-phonon coupling strength. 3.1. Intramolecular modes. 3.2. Alkali phonons. 3.3. Librations. 3.4. Intermolecular modes -- ch. 4. Interacting electron-phonon system. 4.1. Free molecules. 4.2. Spectral functions in metallic fullerenes. 4.3. Model calculation -- ch. 5. Electronic structure. 5.1. Band structure calculations. 5.2. Tight-binding calculations. 5.3. GW calculations. 5.4. Susceptibility. 5.5. Specific heat. 5.6. Density of states. 5.7. Hall effect. 5.8. Photoemission -- ch. 6. Plasmons. 6.1. Experimental results. 6.2. Plasmon dispersion. 6.3. Plasmon broadening -- ch. 7. Metal-insulator transition. 7.1. Experimental results and U/W ratio. 7.2. Calculational approach: Projection Quantum Monte Carlo method. 7.3. Degeneracy ; dependence. 7.4. Filling dependence. 7.5. Lattice structure dependence. 7.6. Effects of electron-phonon and Hund's rule coupling. 7.7. Effects of noncubic lattice structure -- ch. 8. Electrical resistivity. 8.1. Mean free path. 8.2. Resistivity saturation. 8.3. Experimental results. 8.4. Boltzmann theory of resistivity. 8.5. Beyond the Boltzmann equation. 8.6. Different classes of saturation behavior -- ch. 9. Superconductivity. 9.1. Experimental results. 9.2. Retardation effects and Coulomb pseudopotential. 9.3. Local pairing. 9.4. Electronic mechanism. 9.5. Isotope effect. 9.6. Comparison with experiments -- ch. 10. Discussion.
• Sommario/riassunto: Alkali-doped fullerides have attracted strong interest since their production became possible about fifteen years ago. This book presents recent work which may solve intriguing problems arising from a variety of remarkable properties. For example, these solids are superconductors with high transition temperatures, although the similarity between the electronic and phonon energy scales should suppress superconductivity. Moreover, the Ioffe-Regel condition for electrical conductivity is strongly violated. The book shows why superconductivity is nevertheless possible, owing to a local pairing mechanism. The Ioffe-Regel condition is derived quantum-mechanically, and it is explained why the underlying assumptions are violated for fullerides and high-Tc cuprates, for example. The book treats electronic and transport properties, reviewing theoretical and experimental results. It focuses on superconductivity, electrical conductivity and metal-insulator transitions, emphasizing the electron-electron and electron-phonon interactions as well as the Jahn-Teller effect.