## Introduction to Solid State Physics |

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Page 72

ENERGY OF A HARMONIC OSCILLATOR -

elementary result of

oscillator of angular frequency w may be written ( 5 . 4 ) Wn = nhw , where n is the

ENERGY OF A HARMONIC OSCILLATOR -

**QUANTUM**THEORY It is anelementary result of

**quantum**theory that the energy levels of a harmonicoscillator of angular frequency w may be written ( 5 . 4 ) Wn = nhw , where n is the

**quantum**...Page 162

The physical origin of the Weiss field is in the

integral , as pointed out by Heisenberg ( 1928 ) . On certain assumptions it can

be shown that the energy of interaction of atoms i , j bearing spins Si , S ; contains

a ...

The physical origin of the Weiss field is in the

**quantum**- mechanical exchangeintegral , as pointed out by Heisenberg ( 1928 ) . On certain assumptions it can

be shown that the energy of interaction of atoms i , j bearing spins Si , S ; contains

a ...

Page 362

This is in agreement with the more rigorous

79 % LAW For thermal equilibrium the average value of the

for a wave of frequency w is given by ( J . 16 ) ñ = ( Ene - nB ) / Ee - nß = 1 / ( B –

1 ) ...

This is in agreement with the more rigorous

**quantum**theory treatment . BLOCH79 % LAW For thermal equilibrium the average value of the

**quantum**number nfor a wave of frequency w is given by ( J . 16 ) ñ = ( Ene - nB ) / Ee - nß = 1 / ( B –

1 ) ...

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### Contents

LATTICE ENERGY OF IONIC CRYSTALS | 29 |

ELASTIC CONSTANTS OF CRYSTALS | 43 |

LATTICE VIBRATIONS | 60 |

Copyright | |

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alloy applied approximation atoms axes axis band boundary calculated cell chapter charge chloride condition conductivity consider constant crystal cubic defined dependence determined dielectric diffusion direction discussed dislocations displacement distance distribution domains effect elastic electric electron energy equal equation equilibrium example excitation experimental expression factor field force frequency function given gives heat holes interaction ionic ions lattice levels London magnetic magnetic field material mean measurements mechanism metals method molecules motion negative neighbor normal observed obtained parallel particles Phys physical plane polarization positive possible potential problem properties quantum range reference reflection region relation resistivity result room temperature scattering Show shown in Fig sodium solids space specimen stress structure suppose Table temperature theory thermal tion transition unit usually vacancy values volume wave zero