Superconductivity In The Alkali Doped Fullerides PDF Download
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| Author | : Olle Gunnarsson |
| Publisher | : World Scientific |
| Total Pages | : 301 |
| Release | : 2004 |
| Genre | : Science |
| ISBN | : 9812794956 |
Download Alkali-doped Fullerides Book in PDF, ePub and Kindle
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 IoffeOCoRegel condition for electrical conductivity is strongly violated. The book shows why superconductivity is nevertheless possible, owing to a local pairing mechanism. The IoffeOCoRegel condition is derived quantum-mechanically, and it is explained why the underlying assumptions are violated for fullerides and high- T c cuprates, for example. The book treats electronic and transport properties, reviewing theoretical and experimental results. It focuses on superconductivity, electrical conductivity and metalOCoinsulator transitions, emphasizing the electronOCoelectron and electronOCophonon interactions as well as the JahnOCoTeller effect. Contents: Structural Properties; Models and Parameters; Phonons and ElectronOCoPhonon Coupling Strength; Interacting ElectronOCoPhonon System; Electronic Structure; Plasmons; MetalOCoInsulator Transition; Electrical Resistivity; Superconductivity. Readership: Graduate students and researchers in condensed matter physics."
| Author | : Yusuke Nomura |
| Publisher | : Springer |
| Total Pages | : 158 |
| Release | : 2016-08-03 |
| Genre | : Technology & Engineering |
| ISBN | : 9811014426 |
Download Ab Initio Studies on Superconductivity in Alkali-Doped Fullerides Book in PDF, ePub and Kindle
This book covers high-transition temperature (Tc) s-wave superconductivity and the neighboring Mott insulating phase in alkali-doped fullerides. The author presents (1) a unified theoretical description of the phase diagram and (2) a nonempirical calculation of Tc. For these purposes, the author employs an extension of the DFT+DMFT (density-functional theory + dynamical mean-field theory). He constructs a realistic electron–phonon-coupled Hamiltonian with a newly formulated downfolding method. The Hamiltonian is analyzed by means of the extended DMFT. A notable aspect of the approach is that it requires only the crystal structure as a priori knowledge. Remarkably, the nonempirical calculation achieves for the first time a quantitative reproduction of the experimental phase diagram including the superconductivity and the Mott phase. The calculated Tc agrees well with the experimental data, with the difference within 10 K. The book provides details of the computational scheme, which can also be applied to other superconductors and other phonon-related topics. The author clearly describes a superconducting mechanism where the Coulomb and electron–phonon interactions show an unusual cooperation in the superconductivity thanks to the Jahn–Teller nature of the phonons.
| Author | : Yasutami Takada |
| Publisher | : |
| Total Pages | : 10 |
| Release | : 1998 |
| Genre | : |
| ISBN | : |
Download Superconductivity in the Alkali-doped Fullerides Book in PDF, ePub and Kindle
| Author | : Olle Gunnarsson |
| Publisher | : World Scientific |
| Total Pages | : 301 |
| Release | : 2004 |
| Genre | : Science |
| ISBN | : 981238667X |
Download Alkali-doped Fullerides Book in PDF, ePub and Kindle
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-c 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.
| Author | : |
| Publisher | : |
| Total Pages | : 10 |
| Release | : 1992 |
| Genre | : |
| ISBN | : |
Download First-Principles Computational Studies of Alkali-Doped C60 Fullerides Book in PDF, ePub and Kindle
Researchers at AT and T Bell Laboratories reported the discovery of superconductivity at 18 K in a potassium-doped fullerene solid, KxC60. This marked a major turning point in the young history of the C60 molecule 'buckminsterfullerene: from a hypothetical molecular (1085), to small-scale (mg) production of crystalline powders (1988), to large-scale synthesis (1990), to a material with the highest transition temperature of any molecular superconductor. This history represents only one of many research lines. Concurrently with the work at AT and T on partial doping, researchers at the Laboratory for Research on the Structure of Matter at the University of Pennsylvania were doping solid C60 to saturation with potassium. The resulting pure phase, K6C60, was characterized by x-ray diffraction in April 1991: the lattice was body-centered cubic, with the C60 molecules essentially undistorted, orientationally ordered, and each surrounded by a cage of 24 K atoms. Nothing was known about the electronic structure at this early stage.
| Author | : |
| Publisher | : |
| Total Pages | : 15 |
| Release | : 1996 |
| Genre | : |
| ISBN | : |
Download Superconductivity in Cage Doped Fullerenes Book in PDF, ePub and Kindle
Motivated by the discovery of superconductivity in alkali and alkaline earth fullerides, this program was undertaken both to understand the nature of and expand the range of materials demonstrating superconductivity. The first approach involved attempts to modify the fullerene cage by incorporating heteroatoms in the structure and the preparation and photophysical properties of nitrogen and sulfur doped fullerenes were studied in detail. The second approach involved examining the stoichiometry and effect of preparative conditions on the behavior of alkali, alkaline earth, lanthanide and mixed ion fullerides. In particular, we have elaborated on a technique for making such salts using liquid ammonia or aliphatic amines as solvents. Thirdly, modeling studies were undertaken to predict the properties of heterohedral fullerines and metal - C60 complexes, and theoretical guidelines were developed for understanding the reactivity of the fullerene cage to common addition reagents.
| Author | : Karl Alexander Müller |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 416 |
| Release | : 2005-06-23 |
| Genre | : Science |
| ISBN | : 9783540231240 |
Download Superconductivity in Complex Systems Book in PDF, ePub and Kindle
| Author | : Ron D. Weir |
| Publisher | : Gulf Professional Publishing |
| Total Pages | : 460 |
| Release | : 2005-12-27 |
| Genre | : Science |
| ISBN | : 9780444519771 |
Download Measurement of the Thermodynamic Properties of Multiple Phases Book in PDF, ePub and Kindle
1. Introduction. -- 2. Phase Changes in Pure Component Systems: Liquids and Gases. -- 3. Phase Changes in Pure Component Systems: Liquids and Solids. -- 4. Phase Changes in Pure Component Systems: Solid and Solid. -- 5. Vapour-Liquid Equilibrium at Low Pressure. -- 6. Vapour-Liquid Equilibrium at High Pressure. -- 7. Low Pressure Gas Solubility in Liquids. -- 8. Liquid-Liquid Equilibrium. -- 9. Condensed Phases of Organic Materials: Solid-Liquid and Solid-Solid Equilibrium. -- 10. Condensed Phases of Inorganic Materials: Metallic Systems. -- 11. Condensed Phases of Inorganic Materials: Ceramic Systems. -- 12. Condensed Phases of Inorganic Materials: Molten Salts. -- 13. Measurement of Limiting Activity Coefficients Using Non-Analytical Tools. -- 14. Measurement of Limiting Activity Coefficients Using Analytical Tools. -- 15. Measurement of Interfacial Tension. -- 16. Critical Parameters.
| Author | : Karl M. Kadish |
| Publisher | : John Wiley & Sons |
| Total Pages | : 986 |
| Release | : 2000-07-06 |
| Genre | : Science |
| ISBN | : 9780471290896 |
Download Fullerenes Book in PDF, ePub and Kindle
Fullerene, molekulare "Fu?balle" aus 60 oder mehr Kohlenstoffatomen, sind eine Substanzklasse mit vielversprechenden Zukunftsaussichten, beispielsweise als Halbleiter, als Basis pharmazeutischer Wirkstoffe oder Polymerwerkstoffe. Dieses Buch bietet Ihnen einen aktuellen Uberblick uber das dynamische Forschungsgebiet. Zur Sprache kommen modernste Themen wie Metallofullerene, Nanorohren und organisch funktionalisierte Fullerenverbindungen. (06/00)
| Author | : T. Nejat Veziroglu |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 704 |
| Release | : 2004-09-22 |
| Genre | : Science |
| ISBN | : 9781402026676 |
Download Hydrogen Materials Science and Chemistry of Carbon Nanomaterials Book in PDF, ePub and Kindle
The 2003 International Conference "Hydrogen Materials Science and Chemistry of Carbon Nanomaterials" was held in September 2003. In the tradition of the earlier ICHMS conferences, this meeting served as an interdisciplinary forum for the presentation and discussion of the most recent research on transition to hydrogen-based energy systems, technologies for hydrogen production, storage, utilization, materials, energy and environmental problems. The aim of the volume is to provide an overview of the latest scientific results on research and development in the different topics cited above. The representatives from industry, public laboratories, universities and governmental agencies have presented the most recent advances in hydrogen concepts, processes and systems, to evaluate current progress in these areas of investigations and to identify promising research directions for the future.
