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The JahnTeller Effect in C60 and Other Icosahedral Complexesby C. C. Chancey and C. M. O'Brien
Synopses & ReviewsPublisher Comments:Because of the high symmetry involved, the JahnTeller effect is the natural starting point for considering electronphonon (or vibronic) interactions in icosahedral molecules. This work is the first comprehensive theoretical analysis of the JahnTeller interaction in C60 and other icosahedral complexes. The importance of this research derives in part from the increasing, widespread interest in C60 and other molecular clusters and their application in science and industry. The electrical and spectroscopic properties of fullerene and fulleride compounds depend intimately on the coupling between the electronic and vibrational modes of these systems, and this book addresses the fundamental theoretical questions. In particular, a chapter is devoted to the connection between the theory and experimental observations, such as ESR (electron spin resonance) effects and molecular spectra.
Earlier books have discussed the theory of JahnTeller interactions in lower symmetry structures (cubic, tetrahedral, tetragonal, trigonal,...); this is the first that focuses on the new icosahedral systems, whose most famous example is Buckminsterfullerene, C60. The book's authors have over fifty years of combined research experience into the theoretical aspects of the JahnTeller effect. Synopsis:Because of the high symmetry involved, the JahnTeller effect is the natural starting point for considering electronphonon (or vibronic) interactions in icosahedral molecules. This work is the first comprehensive theoretical analysis of the JahnTeller interaction in C60 and other icosahedral complexes. The importance of this research derives in part from the increasing, widespread interest in C60 and other molecular clusters and their application in science and industry. The electrical and spectroscopic properties of fullerene and fulleride compounds depend intimately on the coupling between the electronic and vibrational modes of these systems, and this book addresses the fundamental theoretical questions. In particular, a chapter is devoted to the connection between the theory and experimental observations, such as ESR (electron spin resonance) effects and molecular spectra.
Earlier books have discussed the theory of JahnTeller interactions in lower symmetry structures (cubic, tetrahedral, tetragonal, trigonal,...); this is the first that focuses on the new icosahedral systems, whose most famous example is Buckminsterfullerene, C60. The book's authors have over fifty years of combined research experience into the theoretical aspects of the JahnTeller effect. Description:Includes bibliographical references (p. [189]198) and index.
About the AuthorC. C. Chancey is Professor of Physics at Purdue University. M. C. M. O'Brien is a lecturer in theoretical physics at Oxford University.
Table of ContentsLIST OF FIGURES
LIST OF TABLES GLOSSARY OF SYMBOLS 1. Introduction 1.1 From Past to Present 1.2 Definition and History 1.3 The EXXXBeta (1) Interaction 1.4 The Berry Phase 1.5 Icosahedral Complexes 1.5.1 C(60)Based Materials 1.5.2 Other Icosahedral Clusters 2. Icosahedral Symmetry and Its Effects 2.1 Icosahedral Symmetry 2.2 Geometry of C(60) and the Group I(h) 2.3 Irreducible Representations of I(h) 2.3.1 Spin Representations: The Double Group 2.4 ElectronPhonon Interactions 2.5 Vibrational Modes and Their Symmetries 2.6 Ham Reduction Factors 2.7 Icosahedral JahnTeller Systems 2.7.1 T XXX h and P(n) XXX h 2.7.2 G XXX(g XXX h) 2.7.3 H XXX(g XXX h) 3. T XXX h and P(n) XXX h 3.1 Introduction 3.2 The Potential Energy Surfaces 3.2.1 Rotational Symmetry of T(1) XXX h 3.2.2 The Shape of the Distorted Molecule 3.2.3 "Warping" of the LowestAPES 3.2.4 Modification for T(2) XXX h 3.2.4 Modification for T(2) XXX h 3.3 The Ground States at Strong Coupling 3.3.1 The Ground States in the Adiabatic Approximation 3.3.2 The Ham Factors in T(1) XXX h 3.3.3 The Ham Factors in T(2) XXX h 3.3.4 The Ground State with Warping 3.4 Intermediate Coupling Strength 3.5 Multiple Occupation of T(1) Orbitals 3.5.1 The Configurations P(2) and P(4) 3.5.2 The Configuration P(3) 3.5.3 Numerical Work on p(n) 3.5.4 Term Splittings and Energy Ordering 3.6 Optical Absorption Spectra 3.6.1 Molecular Spectra 3.6.2 Absorption Bands in Solids: The Cluster Model 3.7 The Introduction of SpinOrbit Coupling 3.7.1 XXX XXX E(JT) 3.7.2 XXX Comparable to or Larger than E(JT) 4. Electronic Quartets and GXXX(g XXX h) 4.1 Introduction 4.2 G XXX g 4.2.1 The Method of Opik and Pryce 4.2.2 Biharmonic Parametrization of the G Bases 4.2.3 The Geometry of the Ground States 4.2.4 Numerical Phase Tracking 4.2.5 The Ham Factors in G XXX g 4.3 Symmetry and the Two Phase Spaces 4.4 G XXX h 4.4.1 Phase Tracking and the Ground States 4.4.2 The Ham Factors in G XXX h 4.5 G XXX (g XXX h) 4.5.1 G XXX (g XXX h)(eq) and SO(4) Symmetry 4.5.2 The Ham Factors 4.5.3 Other Relative Coupling Strengths 4.6 Broad Band Spectra 4.7 An Overview of G XXX (g XXX h) 5. Electronic Quintets and HXXX(g XXX h) 5.1 Introduction 5.2 H XXX h(4) 5.3 H XXX h in General 5.4 H XXX h(2) 5.4.1 Bases and the Hamiltonian 5.4.2 Rotational Symmetry of H XXX h(2) 5.4.3 The Ground States at Strong Coupling 5.5 H XXX g 5.6 H XXX (g XXX h(4)(eq) 5.7 H XXX (g XXX h(4) XXX h(2))(eq) 5.7.1 The Ham Reduction Factors 5.8 H XXX (g XXX h) 6. Bridge to Experiment 6.1 Multimode Effects: Cluster Models 6.1.1 A Cluster Model for the Low Energy States 6.1.2 A Cluster for Optical Absorption 6.2 Electron Spin Resonance 6.2.1 JahnTeller Interactions in the Spin Representations of the Group 6.2.2 The Spin Hamiltonian 6.2.3 The g Factors 6.2.4 The Spin Hamiltonian for Spin Triplet States 6.2.5 Esr on C(60): Experiment and Theory 6.3 Energy Levels in C(60)(n) 6.3.1 C(60) Vibrational Modes and Their Coupling 6.3.2 Configuration Interaction in C(60)(n) 6.4 Molecular Spectra 6.4.1 SymmetryLowering Distortions 6.4.2 Allowed Transitions 6.4.3 Experimental Evidence 6.5 C(60)() Spectra 6.6 C(60)(+) Spectra 6.7 Superconductivity in the Fullerides 6.7.1 C(60): Molecular Crystal 6.7.2 Superconducting Fullerides 6.7.3 p(3) XXX h Appendixes A. Adiabatic Approximation A.1 Corrections to the Adiabatic Approximation B. Quantum Tunneling Energies B.1 Introduction B.2 OneDimensional Potentials B.3 Higher Dimensionality B.4 The WKB Approximation and Its Applications B.4.1 OneDimensional Application B.4.2 WKB in More Dimensions C. E XXX D. The Group I E. JahnTeller Interaction Matrices and Their Bases E.1 Basis States E.1.1 L equal to 1 and L equal to 2 Bases E.1.2 Bases from L equal to 3 and Upwards E.1.3 Interaction Matrices F. Transformations F.1 Parametrizations of the h Modes F.2 Rotations to Diagonalize H XXX h(2) F.3 Rotations to Diagonalize T XXX h F.4 Representation of a Rotating Quadrupole G. Parameters of the JahnTeller Minima and Other Stationary Points H. Cited References and Bibliography H.1 Cited References H.2 Bibliography H.2.1 Molecular Quantum Mechanics H.2.2 Group Theory and Techniques H.2.3 The Icosahedral Group H.2.4 The JahnTeller Effect H.2.5 Icosahedral Systems H.2.6 The Berry Phase H.2.7 Spin Resonance H.2.8 Numerical Methods H.2.9 Superconductivity in the Fullerides H.2.10 Molecular Spectra INDEX What Our Readers Are SayingBe the first to add a comment for a chance to win!Product Details
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