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

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Page 172

In the presence of both

therefore given by (1.5) in = q[nfi„E + D„ grad n] and *» = qlPfvE — Dv grad p] and

i = »n + i* □ Note the sign change. In equilibrium the diffusion and field terms ...

In the presence of both

**density**and potential gradients the particle currents aretherefore given by (1.5) in = q[nfi„E + D„ grad n] and *» = qlPfvE — Dv grad p] and

i = »n + i* □ Note the sign change. In equilibrium the diffusion and field terms ...

Page 185

where P0L is the equilibrium

~ 2 10s cm* V-1 s-1 and t~10~'s we find which is a very substantial reduction.

Naturally this low

carrier ...

where P0L is the equilibrium

**density**of holes in the N region. Putting E~10Vcm-1,~ 2 10s cm* V-1 s-1 and t~10~'s we find which is a very substantial reduction.

Naturally this low

**density**will not be maintained along the entire bar, due tocarrier ...

Page 225

We have however split the electrons into two groups of differing mobility and

of wavelength equal to the acoustic wave, and 180° out of phase with one

another ...

We have however split the electrons into two groups of differing mobility and

**density**. The distribution of these two groups in space down the bar is sinusoidal,of wavelength equal to the acoustic wave, and 180° out of phase with one

another ...

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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