## Solid state physics |

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Page 79

lattice, because the orientation of the environment of a point varies from layer to

layer along the c-axis.

types ...

**Note**, as in the case of the diamond structure, that the hep lattice is not a Bravaislattice, because the orientation of the environment of a point varies from layer to

layer along the c-axis.

**Note**also that, when viewed along the c-axis, the twotypes ...

Page 680

To construct the spin Hamiltonian for a two-electron system,

individual electron spin operator satisfies Sf2 = j(j + 1) = f , so that the total spin S

satisfies S2 = (S, + S2)2 = I + 2St • S2. (32.17) Since S2 has the eigenvalue S(S +

1) in ...

To construct the spin Hamiltonian for a two-electron system,

**note**that eachindividual electron spin operator satisfies Sf2 = j(j + 1) = f , so that the total spin S

satisfies S2 = (S, + S2)2 = I + 2St • S2. (32.17) Since S2 has the eigenvalue S(S +

1) in ...

Page 794

+ nJLq) S[co - ws(q)]\ (N.25)

phonon conservation laws (24.9) or (24.10) are satisfied; thus, as a function of

energy, do/dGl dE is a series of sharp delta- function peaks at the allowed final ...

+ nJLq) S[co - ws(q)]\ (N.25)

**Note**that this does indeed vanish unless the one-phonon conservation laws (24.9) or (24.10) are satisfied; thus, as a function of

energy, do/dGl dE is a series of sharp delta- function peaks at the allowed final ...

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### Contents

The Dmle Theory of Metals | 1 |

The Sommerfeld Theory of Metals | 29 |

Failures of the Free Electron Model | 57 |

Copyright | |

48 other sections not shown

### Other editions - View all

Solid State Physics: Advances in Research and Applications, Volume 42 Henry Ehrenreich Limited preview - 1989 |

### Common terms and phrases

alkali atomic band structure Bloch boundary condition Bragg plane Bravais lattice Brillouin zone calculation carrier densities Chapter coefficients collisions conduction band conduction electrons contribution crystal momentum crystal structure density of levels dependence described determined Drude effect electric field electron gas electron-electron electronic levels energy gap equilibrium example Fermi energy Fermi surface Figure frequency given Hamiltonian hexagonal holes impurity independent electron approximation insulators integral interaction ionic crystals ions lattice planes lattice point linear magnetic field metals motion nearly free electron neutron normal modes Note number of electrons one-electron levels orbits periodic potential perpendicular phonon Phys plane waves primitive cell primitive vectors problem properties quantum reciprocal lattice vector region result scattering Schrodinger equation semiclassical semiclassical equations semiclassical model semiconductors simple cubic solid solution specific heat sphere spin superconducting symmetry temperature term thermal tight-binding valence valence band vanishes velocity wave functions wave vector zero