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  • Ultrafast charge recombination in a photoexcited Mott-Hubbard insulator
    Lenarčič, Zala ; Prelovšek, Peter
    We present a calculation of the recombination rate of the excited holon-doublon pairs based on the two-dimensional model relevant for undoped cuprates, which shows that fast processes, observed in ... pump-probe experiments on Mott-Hubbard insulators in the picosecond range, can be explained even quantitatively with the multimagnon emission. The precondition is the existence of the Mott-Hubbard bound exciton of the s-type. We find that its decay is exponentially dependent on the Mott-Hubbard gap and on the magnon energy, with a small prefactor, which can be traced back to strong correlations and consequently large exciton-magnon coupling.
    Vir: Physical review letters. - ISSN 0031-9007 (Vol. 111, iss. 1, 2013, str. 016401-1-016401-5, [1] f. pril.)
    Vrsta gradiva - članek, sestavni del
    Leto - 2013
    Jezik - angleški
    COBISS.SI-ID - 2579044

    Povezava(-e):

    http://prl.aps.org/abstract/PRL/v111/i1/e016401
    DOI

vir: Physical review letters. - ISSN 0031-9007 (Vol. 111, iss. 1, 2013, str. 016401-1-016401-5, [1] f. pril.)
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