Optical Absorption Spectra of Bipolarons
arXiv:cond-mat/0004452 · doi:10.1103/PhysRevB.63.184307
Abstract
The absorption of large bipolarons is investigated using the path-integral method. The response of a bipolaron to an external electromagnetic field is derived in the framework of the memory-function approach. The bipolaron optical absorption spectrum consists of a series of relatively narrow peaks. The peculiarities of the bipolaron optical absorption as a function of the frequency of the electromagnetic field may be attributed to the transitions involving relaxed excited states and scattering states of a bipolaron.
14 pages, 3 figures, E-mail addresses: [email protected], [email protected]; to be published in Phys. Rev. B