The strong IR absorption band found in heteropolar semiconductors is essentially bonded by the TO and LO frequencies for long-wavelength vibrations. The difference between these frequencies can be related to the amount of polar character in the chemical bond in these...
CITATION STYLE
Adachi, S. (1999). The Reststrahlen Region. In Optical Properties of Crystalline and Amorphous Semiconductors (pp. 33–62). Springer US. https://doi.org/10.1007/978-1-4615-5241-3_2
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