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Superconductivity Revisited [Kõva köide]

  • Formaat: Hardback, 192 pages, kõrgus x laius: 234x156 mm, kaal: 454 g
  • Ilmumisaeg: 26-Nov-2012
  • Kirjastus: CRC Press Inc
  • ISBN-10: 1439874263
  • ISBN-13: 9781439874264
  • Formaat: Hardback, 192 pages, kõrgus x laius: 234x156 mm, kaal: 454 g
  • Ilmumisaeg: 26-Nov-2012
  • Kirjastus: CRC Press Inc
  • ISBN-10: 1439874263
  • ISBN-13: 9781439874264
While the macroscopic phenomenon of superconductivity is well known and in practical use worldwide in many industries, including MRIs in medical diagnostics, the current theoretical paradigm for superconductivity (BCS theory) suffers from a number of limitations, not the least of which is an adequate explanation of high temperature superconductivity. This book reviews the current theory and its limitations and suggests new ideas and approaches in addressing these issues. The central objective of the book is to develop a new, coherent, understandable theory of superconductivity directly based on molecular quantum mechanics-- While the macroscopic phenomenon of superconductivity is well known and in practical use worldwide, the current theoretical paradigm for superconductivity suffers from a number of limitations. For example, there is no currently accepted theoretical explanation for the pattern of superconductor critical temperatures in the periodic table. Historical developments in condensed matter were strongly focused on the similarities of all metals and the electron gas model, with little attention paid to their real differences. Accessible by a wide audience, Superconductivity Revisited explores the work of those who investigated the differences, and laid the foundation for all current and future work.Topics IncludePattern of Elemental Superconductors in the Periodic TableHigh-Temperature SuperconductorsElectron Spin in SuperconductorsHeat Capacity and Magnetic Susceptibility in SuperconductorsQuantum Foundations of Molecular Electricity and MagnetismMetals and InsulatorsElectron Transport in MetalsMagnetoresistanceQuantum Hall EffectType I and Type II SuperconductivitySuperconductivity Revisited starts from the foundations and shows that the current theory of the subject cannot explain the pattern of superconductors in the periodic table, as the theory depends on a theory of resistivity not congruent with the Sommerfeld equation. Partial wave scattering is introduced as a route to deal with these issues. The book develops a theory of superconductivity that includes the periodic table. The new, coherent, understandable theory of superconductivity is directly based on thermodynamics, scattering theory, and molecular quantum mechanics.
Preface vii
Acknowledgments xiii
Chapter 1 Introduction
1(4)
Five Unresolved Problems in Superconductivity
1(3)
References
4(1)
Chapter 2 Pattern of Elemental Superconductors in the Periodic Table
5(12)
Chemical Introductory Quantum Mechanics
7(1)
Periodic Table Quantum Structure
8(2)
Metals and Insulators
10(1)
Introduction to Bonding in Metals and Nonmetals
11(4)
Pressure Effects on Superconductivity
15(1)
References
15(2)
Chapter 3 High-Temperature Superconductors, Tc > 77 K
17(4)
d-Wave Symmetry for HTc Superconductors
18(2)
References
20(1)
Chapter 4 Electron Spin in Superconductors
21(6)
Unpaired Electron Spin and Superconductors
21(2)
Low-Temperature Limit of Knight Shift
23(1)
Experimentally Verified Electron Spin in a Superconductor
24(1)
References
25(2)
Chapter 5 Heat Capacity and Magnetic Susceptibility in Superconductors
27(6)
Heat Capacity
27(2)
Magnetic Susceptibility of Superconductors
29(2)
References
31(2)
Chapter 6 Quantum Foundations of Molecular Electricity and Magnetism
33(12)
The Sommerfeld Relationship
33(1)
Wiedemann-Franz Law
34(1)
Origins of Resistivity in Metals
35(1)
Historical Origins of Electron Scattering Resistivity
35(1)
Quantum Magnetoresistance, h/e2
36(1)
Electromagnetic Quanta
37(4)
Dissipative Magnetoresistance
41(1)
Quantum Mechanics and Thermal Conductance
42(1)
References
43(2)
Chapter 7 Metals and Insulators
45(14)
Factors in Forming Metals or Insulators
47(2)
Bonding in Small Clusters of Alkali Metals
49(1)
Bonding Models for Insulators
50(2)
Toward a Qualitative Model for Bonding in Metals
52(3)
Mott Transitions in Metallic Systems
55(1)
References
56(3)
Chapter 8 Electron Transport in Metals
59(18)
Band Theory in Normal Coordinates
59(2)
Resistivity/Conductance
61(1)
Electron Spin in Open Circuit Conductors
61(4)
Resistivity Phenomenology
65(2)
Causes of Electron Scattering in Condensed Metals
67(1)
Molecular Orbital Approaches to Resistivity
68(5)
Electron Phonon Scattering
73(1)
Electron Cyclotron Resonance in Metals
74(1)
References
75(2)
Chapter 9 Magnetoresistance
77(26)
Hall Effect
77(2)
Hall Coefficient
79(1)
Angular Anisotropy of Magnetoresistance
79(3)
Conduction Band Shifts with External Magnetic Fields
82(1)
Meissner-Ochsenfeld Effect
83(1)
Diamagnetic and Paramagnetic Elemental Metals
84(3)
Elemental Ferromagnetism and Paramagnetism
87(2)
Electron Spin and Superconductors
89(2)
Magnetic Susceptibility, Expulsion of External Magnetic Fields by Superconductors
91(1)
Heat Capacity at Tc
92(6)
de Haas van Alphen Effect
98(2)
References
100(3)
Chapter 10 Quantum Hall Effect
103(16)
Landau Levels
106(1)
Origins of Positive Hall Coefficients
107(3)
Origins of Electron Scattering in Metals
110(2)
Low and Zero Electron Scattering in the Quantum Hall Regime
112(2)
Quantum Hall Observation
114(1)
Phase Transition Quanta in the Quantum Hall Regime
115(1)
References
116(3)
Chapter 11 Type I Superconductivity
119(26)
Experimental Type I Superconductivity
119(1)
Critical Magnetic Field versus T for Elemental Superconductors
119(5)
Thermodynamic Variables and Superconductivity
124(2)
Mott Transition, Electron Pair Bonds, and Superconductivity
126(2)
Experimental Approaches to Spin Pairing and Superconductivity
128(1)
Thermodynamic/Electronic Contributions to the Superconductor Energy Gap
128(3)
Empirical/Theoretical Requirements for Superconductivity
131(1)
Superconducting Phase Transition at a Temperature Determined by Zero Scattering for the Highest Energy Conducting Electrons
132(1)
Material Must Be Three-Dimensional and Large Enough to Support a Nonsuperconducting Boundary Layer
132(1)
T Dependent Energy Gap Must Exist between the Highest Occupied Conducting and Lowest Vacant Bands of the Superconductor
133(1)
Conduction Band for the Superconductor Must Have Zero Electron Scattering
134(1)
Volume Magnetic Susceptibility Must Be -1
134(1)
Periodic Table of One-Bar Superconductors: Does It Fit These Requirements for Superconductivity?
135(5)
Estimating the Order of Tc for Elemental Superconductors
140(2)
References
142(3)
Chapter 12 Type II Superconductivity
145(10)
Isotope Effects in Superconductors
145(1)
Conduction Band in MgB2
146(1)
Isotope Effects in Type II Superconductors
147(3)
Vortex Lattices
150(3)
References
153(2)
Chapter 13 Conclusions
155(6)
What about the Five Unresolved Problems in Superconductivity?
155(1)
Pattern of Elemental Superconductors at One Bar in the Periodic Table
155(1)
High-Temperature Superconductivity, Superconductors with Critical Temperatures, Tc > 77 K
156(1)
Unpaired Electron Spin in Superconductivity
157(1)
Higher Specific Heat Capacity at Constant Pressure in Superconductors as Compared to the Normal Metals
158(1)
Superconductivity's Alignment with the Rest of Atomic and Molecular Quantum Mechanics
159(1)
Summary
159(1)
References
160(1)
Glossary 161(10)
Variables, Constants, Acronyms 171(2)
Index 173
Dougherty, Ralph; Kimel, J. Daniel