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キーワード:
Condensed Matter; Strongly Correlated Electrons; PACS numbers: 71.27.+a, 78.47.J-, 78.55.Kz
要旨:
We present a theory for the recombination of (charged) holons and doublons in one-dimensional organic Mott insulators, which is responsible for the decay of the photoexcited state. Due to the charge-spin separation, the dominant mechanism for recombination at low density of charges involves a multiphonon emission. We show that a reasonable coupling to phonons is sufficient to explain the fast recombination observed by pump-probe experiments in ET−F2TCNQ, whereby we can also account for the measured pressure dependence of the recombination rate.
