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

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Page 42

It may be interesting to consider how the

the free electron picture. Si and Ge have four

free, while ignoring the electrons of inner shells. Since there are two atoms per ...

It may be interesting to consider how the

**band**structure of Si and Ge is related tothe free electron picture. Si and Ge have four

**valence**electrons which we treat asfree, while ignoring the electrons of inner shells. Since there are two atoms per ...

Page 48

heavy holes and light holes exist, but the shape of the bands is not known with

complete certainty. The

mass is very small (0.013 m), hence the density of states is low. There is

evidence ...

heavy holes and light holes exist, but the shape of the bands is not known with

complete certainty. The

**conduction band**has its minimum at fc = 0; the effectivemass is very small (0.013 m), hence the density of states is low. There is

evidence ...

Page 319

This expression can, to a good approximation, be applied to p-type germanium

which has been sufficiently doped, where direct forbidden interband transitions

have been observed between the split-off

valence ...

This expression can, to a good approximation, be applied to p-type germanium

which has been sufficiently doped, where direct forbidden interband transitions

have been observed between the split-off

**valence band**and the other twovalence ...

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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