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Image Potentials and Image Forces in the Polaron Theory
Author(s) -
Pokatilov E. P.,
Beril S. I.,
Fomin V. M.
Publication year - 1988
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221470118
Subject(s) - recoil , dielectric , electron , polaron , condensed matter physics , physics , constant (computer programming) , dispersion (optics) , semiconductor , rectangular potential barrier , quantum electrodynamics , quantum mechanics , computer science , programming language
A polaronic approach for the problem of image force potential is developed. Within this approach dispersion of the dielectric constant and electron recoil effects are taken into account. For the semiconductor‐vacuum interface at small values of electron effective mass and high values of semiconductor dielectric constant the electron recoil is found to cause a greater reduction of the potential than the dispersion of dielectric constant, and to play the main role in cutting off the singularities of the image force potential. Analytic formulae for the image force potential energy are obtained accounting for the electron recoil effects and ignoring the dispersion. The coordinate dependences of this potential in vacuum and in medium are analyzed.