## Solid state physics |

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Page 142

The difference in energy between the highest occupied level and the lowest un- *

occupied level (i.e., between the "top" of the highest occupied band and the "

bottom" of the lowest empty band) is known as the

The difference in energy between the highest occupied level and the lowest un- *

occupied level (i.e., between the "top" of the highest occupied band and the "

bottom" of the lowest empty band) is known as the

**band gap**. We shall find that ...Page 566

Some examples of the more important semiconductors are given in Table 28.1.

The

the

Some examples of the more important semiconductors are given in Table 28.1.

The

**energy gaps**quoted for each are reliable to within about 5 percent. Note thatthe

**energy gaps**are all temperature-dependent, varying by about 10 percent ...Page 568

This is typically a few hundredths of an electron volt, and therefore of little

consequence except in semiconductors with very small

intrinsic ...

This is typically a few hundredths of an electron volt, and therefore of little

consequence except in semiconductors with very small

**energy gaps**.7 The**energy gap**may also be deduced from the temperature dependence of theintrinsic ...

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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