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

### From inside the book

Results 1-3 of 69

Page 22

The next approximation is to introduce a small periodic

treated as a perturbation. Since the

Fourier series in terms of the reciprocal lattice vectors Kn (6.2) V(r) = ^ W(KJex?

The next approximation is to introduce a small periodic

**potential**that may betreated as a perturbation. Since the

**potential**is periodic, it may be expanded in aFourier series in terms of the reciprocal lattice vectors Kn (6.2) V(r) = ^ W(KJex?

Page 205

These two approaches differ in their choice of scattering

Weisskopf use a Coulomb

spacing between impurities (2d = Nji). This must be done to avoid an infinite ...

These two approaches differ in their choice of scattering

**potential**. Conwell andWeisskopf use a Coulomb

**potential**cut-off abruptly at d, where 2d is the averagespacing between impurities (2d = Nji). This must be done to avoid an infinite ...

Page 490

Introduction. We shall now go on to consider in a fair amount of detail the ease in

which the periodic lattice

impurity which exerts on an electron a force additional to that of the lattice

Introduction. We shall now go on to consider in a fair amount of detail the ease in

which the periodic lattice

**potential**is upset by the presence of some defect orimpurity which exerts on an electron a force additional to that of the lattice

**potential**.### What people are saying - Write a review

We haven't found any reviews in the usual places.

### Other editions - View all

### 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