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

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Page 207

The Born

depends on what is called the Born

page 161). The essential assumption is that the change in energy, Ae, on

scattering ...

The Born

**approximation**. The validity of all the above discussion on scatteringdepends on what is called the Born

**approximation**(see, for example, Schiff [17],page 161). The essential assumption is that the change in energy, Ae, on

scattering ...

Page 489

We then consider our effective mass

true no matter how small the field S is; the period of time during which the

effective mass

will ...

We then consider our effective mass

**approximation**to have broken down. This istrue no matter how small the field S is; the period of time during which the

effective mass

**approximation**is valid will merely increase as & is decreased butwill ...

Page 503

V from which we see that fi increases with Thus, for large enough values of X, our

effective-mass

th Landau level. We therefore cannot describe the behaviour of electrons in ...

V from which we see that fi increases with Thus, for large enough values of X, our

effective-mass

**approximation**is not valid in the zero-field states which form the N-th Landau level. We therefore cannot describe the behaviour of electrons in ...

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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