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

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Page 76

In an imperfect crystal therefore one can distinguish a variety of

crystal constituents present at abnormal sites (e.g. intersitials or, for instance in

the ...

In an imperfect crystal therefore one can distinguish a variety of

**structure****elements**: normal crystal constituents, occupying their normal positions; normalcrystal constituents present at abnormal sites (e.g. intersitials or, for instance in

the ...

Page 77

If for these cases the

of an X atom on an X site are designated by MM. resp Xx, the following relation

exists between these

means ...

If for these cases the

**structure element**consisting of an M atom on an M site andof an X atom on an X site are designated by MM. resp Xx, the following relation

exists between these

**structure elements**and those mentioned before: Thatmeans ...

Page 88

According to this convention all symbols for the

represent

electrons.

According to this convention all symbols for the

**structure elements**met so farrepresent

**structure elements**having an effective charge zero. It may happen that**structure elements**are ionized by the addition or removal of one or moreelectrons.

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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