Premium
Binding of an exciton to a donor‐acceptor pair in a semiconductor ii. binding energy and critical separation in the case of a coulomb interaction – influence of the polarization effects
Author(s) -
StÉabEá B.,
Munschy G.
Publication year - 1973
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.2220600114
Subject(s) - coulomb , exciton , acceptor , binding energy , polarization (electrochemistry) , ionic bonding , wave function , semiconductor , atomic physics , electron , electric potential energy , molecular physics , condensed matter physics , chemistry , physics , materials science , energy (signal processing) , quantum mechanics , ion
The binding energy of an exciton to a donor–acceptor pair is calculated in the approximation of Coulomb interactions. Haken's potential is also considered to take into account the electronic and ionic polarization effects. To this aim, the variation method is applied to an electron‐hole product wave function with two adjustable parameters. The computations are made for both equal and unequal electron and hole effective masses. The results obtained compare favourably to the experimental data in ZnSe. Haken's potential is found to be suitable for donor‐acceptor separations close to the critical length, in which case the polarization effects are still important.