Study of ortho-to-paraexciton conversion in CuO by excitonic Lyman spectroscopy
arXiv:cond-mat/0408605 · doi:10.1103/PhysRevLett.94.016403
Abstract
Using time-resolved - excitonic Lyman spectroscopy, we study the orthoexciton-to-paraexcitons transfer, following the creation of a high density population of ultracold orthoexcitons by resonant two-photon excitation with femtosecond pulses. An observed fast exciton-density dependent conversion rate is attributed to spin exchange between pairs of orthoexcitons. Implication of these results on the feasibility of BEC of paraexcitons in CuO is discussed.
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