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

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Page 262

It is assumed here that m* and g* are independent of energy which is the

situation that holds for strictly parabolic ... the nonparabolic nature of the energy

bands in InSb has also been inferred from measurements of the optical

It is assumed here that m* and g* are independent of energy which is the

situation that holds for strictly parabolic ... the nonparabolic nature of the energy

bands in InSb has also been inferred from measurements of the optical

**energy****gap**as a ...Page 304

(1.22), obtain the parameters A, B and G for the valence band. A plot of the

experimental results is given in Fig. 39 and it can be seen from the figure that an

(1.22), obtain the parameters A, B and G for the valence band. A plot of the

experimental results is given in Fig. 39 and it can be seen from the figure that an

**energy gap**e, = 0.228 eV at 80°K is obtained by extrapolation to zero field.Page 319

These transitions, which occur at energies well below the

seen since they are not masked out by the stronger direct allowed or indirect

transitions. The theory can be extended to the case of degenerate

semiconductors by ...

These transitions, which occur at energies well below the

**energy gap**, can beseen since they are not masked out by the stronger direct allowed or indirect

transitions. The theory can be extended to the case of degenerate

semiconductors by ...

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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