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Relation of Group Theory to Quantum mechanics | |
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Symmetry Operations | |
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Abstract Group Theory | |
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Commuting Observables and Classes | |
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Representations and Irreducible Representations | |
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Relation between Representations, Characters, and States | |
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Continuous Groups | |
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Summary | |
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Point Groups | |
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Generators of the Proper Rotation Group R superscript + (3) | |
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The Commutator Algebra of R superscript + (3) | |
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Irreducible Representations of R superscript + (3) | |
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Characters of the Irreducible Representations of R superscript + (3) | |
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The Three-dimensional Representation j=1 of R superscript + (3) | |
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The Spin Representation j=1/2 of R superscript + (3) | |
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Class Structure of Point Groups | |
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The Proper Point Groups | |
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Nature of Improper Rotations in a Finite Group | |
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Relation between Improper and Proper Groups | |
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Representations of Groups Containing the Inversion | |
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Product Groups | |
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Representations of an Outer Product Group | |
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Enumeration of the Improper Point Groups | |
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Crystallographic Point Groups | |
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Double Point Groups | |
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Summary | |
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Point Group Examples | |
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Electric and Magnetic Dipoles: Irreducible Components of a Reducible Space | |
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Crystal field Theory without Spin: Compatibility Relations | |
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Product Representations and Decomposition of Angular Momentum | |
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Selection rules | |
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Spin and Spin-Orbit Coupling | |
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Crystal Field Theory with Spin | |
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Projection Operators | |
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Crystal Harmonics | |
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Summary | |
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Macroscopic Crystal Tensors | |
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Macroscopic Point Group Symmetry | |
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Tensors of the First Rank: Ferroelectrics and Ferromagnetics | |
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Second-Rank Tensors: Conductivity, Susceptibility | |
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Direct Inspection Methods for Tensors of Higher Rank: the Hall Effect | |
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Method of Invariants | |
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Measures of Infinitesimal and Finite Strain | |
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The Elasticity Tensor for Group C subscript (3upsilon) | |
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Summary | |
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Molecular Vibrations | |
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Representations contained in NH subscript 3 vibrations | |
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Determination of the Symmetry Vectors for NH subscript 3 | |
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Symmetry Coordinates, Normal Coordinates, Internal Coordinates, and Invariants | |
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Potential Energy and Force Constants | |
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The Number of Force Constants | |
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Summary | |
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Translational Properties of Crystals | |
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Crystal Systems, Bravais Lattices, and Crystal Classes | |
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Representations of the Translation Group | |
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Reciprocal Lattices and Brillouin Zones | |
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Character Orthonormality Theorems | |
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Conservation of Crystal Momentum | |
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Laue-Bragg X-ray Diffraction | |
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Summary | |
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Electronic Energy Bands | |
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Relation between the Many-Electron and One-Electron Viewpoints | |
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Concept of an Energy Band | |
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The Empty Lattice | |
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Almost-Free Electrons | |
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Energy Gaps and Symmetry Considerations | |
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Points of Zero Slope | |
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Periodicity in Reciprocal Space | |
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The k • p Method of Analytical Continuation | |
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Dynamics of Electron Motion in Crystals | |
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Effective Hamiltonians and Donor States | |
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Summary | |
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Space Groups | |
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Screw Axes and Glide Planes | |
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Restrictions on space Group Elements | |
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Equivalence of Space Groups | |
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Construction of Space Groups | |
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Factor Groups of Space Groups | |
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Groups G subscript k of the Wave Vector k | |
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Space Group Algebra | |
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Representations of Symmorphic Space Groups | |
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Representations of Nonsy | |