摘要
The properties of large bipolarons in two and three dimensions are investigated by averaging over therelative wavefunction of the two electrons and using the Lee-Low-Pines-Huybrechts variational method.The ground-state(GS)and excited-state energies of the Frhlich bipolaron for the whole range of electron-phonon coupling constantscan be obtained.The energies of the first relaxed excited state(RES)and Franck-Condon(FC)excited state of thebipolaron are also calculated.It is found that the first RES energy is lower than the FC state energy.The comparisonof our GS and RES energies with those in literature is also given.
The properties of large bipolarons in two and three dimensions are investigated by averaging over the relative wavefunction of the two electrons and using the Lee-Low-Pines-Huybrechts variational method.The ground- state(GS)and excited-state energies of the Frhlich bipolaron for the whole range of electron-phonon coupling constants can be obtained.The energies of the first relaxed excited state(RES)and Franck-Condon(FC)excited state of the bipolaron are also calculated.It is found that the first RES energy is lower than the FC state energy.The comparison of our GS and RES energies with those in literature is also given.
基金
the Natural Science Foundation of the Education Bureau of Zhejiang Province under Grant No.200601309
partially by National Natural Science Foundation of China under Grant No.10274067
