Abstract
The polaron correction to the energy of the two-electron bound (D-)
states of a shallow donor in weakly polar semiconductors is calculated.
Both upper and lower bounds to the energy shift of the ground state and
also to the D- transition energy are derived within second-order
perturbation theory. The results show a stronger polaron effect in these
systems than for two independent single-electron systems. The polaron
correction to the D- level depends strongly on the properties of the
electron-phonon interaction and/or the relative position of the two
electrons. S0163-1829(98)01207-7.
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