Optical Absorption Spectra of Bipolarons

Details Optical Absorption Spectra of Bipolarons Optical Absorption Spectra of Bipolarons

2000-04-26

arxiv.org/abs/cond-mat/0004452v2

Phys. Rev. B, 63 (2001) 184307

Physics

Condensed Matter

Strongly Correlated Electrons

14 pages, 3 figures, E-mail addresses: devreese@uia.ua.ac.be, fomin@uia.ua.ac.be; to be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.63.184307

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.

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