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Journal of Physical Studies 10(1), 39–45 (2006)
DOI: https://doi.org/10.30970/jps.10.39 POLARON ENERGY SPECTRUM OF QUASI-TWO-DIMENSIONAL NANOHETEROSYSTEMS WITH A QUANTUM WELL OF FINITE AND INFINITE DEPTHV. I. Boichuk, V. A. Borusevych
Ivan Franko Drohobych State Pedagogical University, |
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The wave vector dependence of the polaron energy spectrum is considered in quasi-two-dimensional heterosystems of various values ($0 < α < 3)$ of electron-phonon interaction parameter. The comparative analyses of the polaron energy spectrum of heterostructures of finite and infinite energy band disruption on the boundary of media is made by using the perturbation approach and variation Lee-Low-Pines method. Actual calculations are conducted for the following heterostructures: GaAs/AlAs, CdSe/glass and CuCl/glass, where the weak and transition electron-phonon coupling is realized: $α = 0.071$, $α = 0.0461$ and $α = 2.091$, respectively. The average number of virtual phonons surrounding the electron is also determined. The polaron coupling energy and its effective mass as a function of the wave vector is calculated. The structures of a varying electron-phonon coupling are compared.
PACS number(s): 63.20.Kr, 79.60.Jv