## Proceedings of the International School of Physics "Enrico Fermi.", Volume 22N. Zanichelli, 1963 - Nuclear physics |

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Page 1

The band theory of solids is a model for the study of the electronic properties of

crystals; it is based on that point of view which

large molecule in which it has no meaning to associate an electron to a given ...

The band theory of solids is a model for the study of the electronic properties of

crystals; it is based on that point of view which

**considers**a crystal as a single verylarge molecule in which it has no meaning to associate an electron to a given ...

Page 27

As shown especially by Wigner and co-workers, if the crystal does not contain

screw axes or glide planes (and we shall

types of bands possible at any point in fc-space are entirely determined by the

group ...

As shown especially by Wigner and co-workers, if the crystal does not contain

screw axes or glide planes (and we shall

**consider**here only such crystals), thetypes of bands possible at any point in fc-space are entirely determined by the

group ...

Page 490

Introduction. We shall now go on to

which the periodic lattice potential is upset by the presence of some defect or

impurity which exerts on an electron a force additional to that of the lattice

potential.

Introduction. We shall now go on to

**consider**in a fair amount of detail the ease inwhich the periodic lattice potential is upset by the presence of some defect or

impurity which exerts on an electron a force additional to that of the lattice

potential.

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### Common terms and phrases

absorption acceptor approximation assumed band edge band structure Brillouin zone calculated carrier centre charge Chem coefficient components compound concentration conduction band consider constant corresponding crystal curves cyclotron resonance degenerate density diffusion direct transition discussed donor doping effective mass electric field energy gap energy surfaces equation equilibrium example exciton experimental expression Faraday rotation foreign atoms free electron frequency germanium given hence holes imperfections impurity indium antimonide InSb interaction interband ionization ions Journ lattice levels linear liquid magnetic field matrix measurements melt mobility momentum obtained optical p-type phonon Phys potential pressure quantum range reciprocal lattice region samples scattering semiconductors shown in Fig spherical spin spin-orbit structure elements symmetry tensor theory thermodynamic thermodynamic potentials tion transverse valence band valley Voigt effect wave functions wave vector Zeeman effect zero zone