Introduction to Solid State Physics |
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Page 365
... absorption threshold has a simple variation with the photon energy ; the threshold determines the energy gap as Eg = hw ,. In ( b ) the optical absorption is weaker near the threshold : at the photon energy hoE + h a photon is absorbed ...
... absorption threshold has a simple variation with the photon energy ; the threshold determines the energy gap as Eg = hw ,. In ( b ) the optical absorption is weaker near the threshold : at the photon energy hoE + h a photon is absorbed ...
Page 615
... absorption coefficient , as in I ( x ) = lo exp ( −ax ) . The energy gap and exciton binding energy are de- Huced from the shape of the absorption curve : he gap E , is 1.521 ev and the exciton binding energy is 0.0034 ev . Eg Eg - Eb ...
... absorption coefficient , as in I ( x ) = lo exp ( −ax ) . The energy gap and exciton binding energy are de- Huced from the shape of the absorption curve : he gap E , is 1.521 ev and the exciton binding energy is 0.0034 ev . Eg Eg - Eb ...
Page 634
... absorption of the pure KCl crystal ( Fig . 8 ) begins at 1650 Å and extends to shorter wavelengths . The thallium introduces two bell - shaped absorption bands centered about 1960 Å and 2490 Å , and a broad emission band centered about ...
... absorption of the pure KCl crystal ( Fig . 8 ) begins at 1650 Å and extends to shorter wavelengths . The thallium introduces two bell - shaped absorption bands centered about 1960 Å and 2490 Å , and a broad emission band centered about ...
Contents
CRYSTAL STRUCTURE | 1 |
CRYSTAL DIFFRACTION AND THE RECIPROCAL LATTICE | 43 |
CRYSTAL BINDING | 95 |
Copyright | |
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absolute zero absorption alkali halide alloy antiferromagnet applied field atoms axis boundary Brillouin zone calculated Chapter charge components conduction band conduction electrons crystal structure cubic density dielectric constant dielectric function diffraction dipole direction dislocation dispersion relation effective mass elastic electric field electron concentration electron gas energy gap equation equilibrium excited exciton experimental F center Fermi surface ferroelectric ferromagnetic Figure free electron frequency function given heat capacity hole impurity interaction ionic lattice constant lattice points low temperatures magnetic field magnetic moment magnon metal modes momentum motion nearest neighbors neutron normal nuclear optical orbital paramagnetic particle phase phonon Phys plane polarization positive potential primitive cell quantum reciprocal lattice vector region resonance result room temperature scattering semiconductor shown in Fig space specimen sphere superconducting theory thermal tion transition unit vacancy valence band velocity wavefunction wavelength wavevector x-ray