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

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Page 183

Tunnelling can and does occur into and between

mechanism of

enough for a true

Tunnelling can and does occur into and between

**impurity**levels. Indeed this is amechanism of

**impurity**« band » conduction when the**impurity**density is not highenough for a true

**impurity**band to be formed. If, for example, there is a sufficient ...Page 236

A maximum in Hall constant can occur in a two-band model (formally identical

with that discussed in connection with the valence band of germanium) and

hence Hung and Gliessman postulated parallel conduction in a low mobility

A maximum in Hall constant can occur in a two-band model (formally identical

with that discussed in connection with the valence band of germanium) and

hence Hung and Gliessman postulated parallel conduction in a low mobility

**impurity**...Page 363

Clearly the larger the volume of the melt, the larger the amount of the solid which

can be grown fulling within specified limits of

in which greater uniformity can be achieved is by programming the growth rate, ...

Clearly the larger the volume of the melt, the larger the amount of the solid which

can be grown fulling within specified limits of

**impurity**concentration. Another wayin which greater uniformity can be achieved is by programming the growth rate, ...

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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