By using hyperspherical coordinates, and assuming quasi-separability of the hyper-radius from the angular variables in the wave functions, low-lying adiabatic channel potentials were obtained for 2-dimensional D- centres. In the large hyper-radius limit, these potential curves converged to the thresholds of the energy levels of the neutral donor. The energy eigenstates which were supported by these potentials were calculated.

Ground and Doubly Excited States of Two-Dimensional D- Centres. W.Y.Ruan, K.S.Chan, E.Y.B.Pun: Physical Review B, 2001, 63[20], 205204 (10pp)