Titlebook: Electronic Properties of Materials; An Introduction for Rolf E. Hummel Textbook 19851st edition Springer-Verlag Berlin Heidelberg 1985 Wer

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Electrical Conduction in Polymers, Ceramics, and Amorphous Materialsics industry, for example as handles for a variety of tools, as coatings of wires, or for casings of electrical equipment. Most polymeric materials have the required insulating properties and have been used for decades for this purpose. It came, therefore, as a surprise when it was discovered that s

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Quantum Mechanical Treatment of the Optical Propertiesh equations which reproduce the optical spectra of solids reasonably well. Unfortunately, the treatment had one flaw: For calculation and interpretation of the infrared absorption we used the concept that electrons in metals are free; whereas, the absorption bands in the visible and ultraviolet spec

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Applications absorption and emission spectra are known to be extremely sharp. Thus, absorption and emission energies for atoms can be determined with great accuracy. The same is basically true for molecular spectra. In contrast to this, the optical spectra of solids are rather broad. This stems from the high pa

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