## Proceedings of the International School of Physics "Enrico Fermi.", Volume 52N. Zanichelli, 1972 - Nuclear physics |

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### Contents

excitations | 3 |

Electric field polarization and dielectric constant | 22 |

Types of binding and of polarization | 29 |

Copyright | |

62 other sections not shown

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### Common terms and phrases

acoustic applied approximation assumed atoms band bond calculated charge co-ordinate coefficients compared components condition consider constant contribution corresponding coupling crystal curve defined density dependence derived described determined dielectric direction discussed dispersion displacement effect elastic electric field electro-optic electronic energy equation excitation experiment experimental expression factor field force frequency function given gives harmonic included independent indices interaction invariant involving ionic lattice leads light limit linear macroscopic magnetic material measured method mode nonlinear normal observed obtained optical oscillator parameters phase phonons Phys physical piezoelectric polariton polarization possible potential present propagation properties Raman REFERENCES relation represents requires respectively rotation scattering shown solid splitting strain structure surface symmetry tensor theory transition transverse unit cell valence values wave wave vector zero