TL;DRAbstract
The interactions of photons with electrons and phonons were already extensively discussed in the preceding chapters. These interactions are special cases of the general interactions of a crystal with quantized and nonquantized external fields, i.e., forces. The latter are given by static or quasistatic electric, magnetic, and electromagnetic fields, mechanical strain and pressure, thermal gradients etc. If several of these forces are simultaneously applied to the crystal, the reactions of the crystal with respect to these forces are correlated. We describe these correlations in the framework of irreversible quantum statistics which includes the special case of irreversible linear thermodynamics. The calculations are performed for homogeneous crystals and are developed in such a way that an extension to heterogeneous materials which are used for technical applications and which are not treated here can be performed along the same lines.
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The interactions of photons with electrons and phonons were already extensively discussed in the preceding chapters. These interactions are special cases of the general interactions of a crystal with quantized and nonquantized external fields, i.e., forces. The latter are given by static or quasistatic electric, magnetic, and electromagnetic fields, mechanical strain and pressure, thermal gradients etc. If several of these forces are simultaneously applied to the crystal, the reactions of the crystal with respect to these forces are correlated. We describe these correlations in the framework of irreversible quantum statistics which includes the special case of irreversible linear thermodynamics. The calculations are performed for homogeneous crystals and are developed in such a way that an extension to heterogeneous materials which are used for technical applications and which are not treated here can be performed along the same lines.
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