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

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Page 202

Lattice (

are very unlikely and can be neglected) can be described cither by interaction

between electron and lattice waves or by collisions between particles, the

Lattice (

**phonon**) scattering. Single**phonon**collisions (multiple**phonon**processesare very unlikely and can be neglected) can be described cither by interaction

between electron and lattice waves or by collisions between particles, the

**phonon**...Page 510

Since the LA and LO modes are degenerate (see Dr. Cochran's lectures) at the

zone edge in the <100> directions we should expect the TO

here to be the more energetic. This is also in accordance with the neutron

scattering ...

Since the LA and LO modes are degenerate (see Dr. Cochran's lectures) at the

zone edge in the <100> directions we should expect the TO

**phonon**as usedhere to be the more energetic. This is also in accordance with the neutron

scattering ...

Page 513

involving emission of a

transitions involving absorption of a

usual the forbidden energy gap and Ev the

q is ...

involving emission of a

**phonon**, when hv > AE + Ev, and as (hv — AE+Ev)* fortransitions involving absorption of a

**phonon**, when hv > AE — Ev, AE being asusual the forbidden energy gap and Ev the

**phonon**energy equal to hco(q). Hereq is ...

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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