The In4Se3 Crystal as a Three-Dimensional Imitative Model of Phenomena in One-Dimensional Crystals |
| D.M. Bercha, M. Sznajder Institute of Physics, Pedagogical University of Rzeszów, Rejtana 16a, 35-310 Rzeszów, Poland A.I. Bercha, L.Yu. Kharkhalis and K. Rushchanskii Institute of Physics and Chemistry of Solid State, Uzhgorod State University, Ukraine |
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| For three-dimensional charge carriers described by the dispersion law with quartic terms of the wave vector, the density of states function similar as in the one-dimensional case was determined. This similarity allows the Pekar and Dejgen condenson states in the continuum approximation to exist. The calculated phonon spectrum reveals optical vibrations of a very low frequency, which favours the electron-phonon interaction and creation of the condenson states. |
| DOI: 10.12693/APhysPolA.94.250 PACS numbers: 71.20.Nr, 71.45.-d, 63.20.Dj, 63.20.Kr, 63.22.+m |