Distinct pseudogap and superconducting state quasiparticle relaxation dynamics in near-optimally doped SmFeAsO0.8F0.2 single crystals

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dc.creatorMertelj, T.
dc.creatorKabanov, V. V.
dc.creatorGadermaier, C.
dc.creatorKarpinski, J.
dc.creatorMihailovic, D.
dc.date2008-08-20
dc.date2008-10-06
dc.date.accessioned2026-07-07T10:07:21Z
dc.date.available2026-07-07T10:07:21Z
dc.descriptionWe use femtosecond spectroscopy to investigate the quasiparticle relaxation and low-energy electronic structure in a near-optimally doped pnictide superconductor with T_c=49.5 K. Multiple relaxation processes are evident, with distinct superconducting state quasiparticle (QP) recombination dynamics exhibiting a T-dependent superconducting (SC) gap, and a clear "pseudogap" (PG) -like feature with an onset around 200K indicating the existence of a temperature-independent gap of magnitude Δ_PG= 61 +- 9 meV above T_c. Both the SC and PG components show saturation as a function of fluence with distinct saturation thresholds ~0.15 \muJ/cm^2 and 1.5 \muJ/cm^2, respectively.
dc.identifierhttps://arxiv.org/abs/0808.2772
dc.identifierhttp://arxiv.org/abs/0808.2772
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/170604
dc.subjectSuperconductivity
dc.titleDistinct pseudogap and superconducting state quasiparticle relaxation dynamics in near-optimally doped SmFeAsO0.8F0.2 single crystals
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