Proceedings of the International School of Physics "Enrico Fermi.", Volume 22N. Zanichelli, 1963 - Nuclear physics |
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Page 27
... symmetry properties of the crystal . We saw already how the symmetry under translations leads to the classification of the various levels of a band by means of k - vectors . The classification of the various bands at each point in k ...
... symmetry properties of the crystal . We saw already how the symmetry under translations leads to the classification of the various levels of a band by means of k - vectors . The classification of the various bands at each point in k ...
Page 37
... symmetry . For other values of k , of lower symmetry , the splitting is of course dif- ferent : there are generally more levels for a given 1 , and the wave functions of the various irreducible representations include more orders of ...
... symmetry . For other values of k , of lower symmetry , the splitting is of course dif- ferent : there are generally more levels for a given 1 , and the wave functions of the various irreducible representations include more orders of ...
Page 44
... symmetry , the inversion being a symmetry operation of the diamond lattice : in crystals with such a symmetry operation the origin of k - space must always be an extremum for the energy . If the band at k = 0 is nondegene- rate , the ...
... symmetry , the inversion being a symmetry operation of the diamond lattice : in crystals with such a symmetry operation the origin of k - space must always be an extremum for the energy . If the band at k = 0 is nondegene- rate , the ...
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absorption acceptor approximation band edge band structure Brillouin zone calculated carrier Chem coefficient compound concentration conduction band constant corresponding crystal cyclotron resonance density diffusion direction 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 K,PM K₁ lattice levels linear liquid magnetic field matrix measurements melt mobility momentum N₁ obtained optical p-type phase phonon Phys potential pressure quantum range reciprocal lattice region Rendiconti S.I.F. samples scattering semiconductors shown in Fig solid spin-orbit structure elements symmetry temperature tensor theory thermodynamic potentials transition transverse valence band Voigt effect wave functions wave vector Zeeman effect zero zone