Ground and Excited States of the Two and Three Dimensional Bipolaron in a Quantum Dot
We apply the Lee-Low-Pines-Huybrechts variational method to study the properties of the two and three dimensional bipolaron in a quantum dot. The ground-state (GS) and two types of excited-state energies of the Fröhlich bipolaron for the whole range of electron-phonon coupling constants can be obtained. Compared with the Franck-Condon excited state, the first relaxed excited state has a lower energy. Effects of quantum dot confinement on the excitation energies of the bipolaron are given.
Yafang Han et al.
Y. H. Ruan et al., "Ground and Excited States of the Two and Three Dimensional Bipolaron in a Quantum Dot", Materials Science Forum, Vols. 546-549, pp. 1945-1950, 2007