Femtosecond quasiparticle relaxation dynamics and probe polarization anisotropy inYSrxBa2−xCu4O8(x=0,0.4)

2002/03/31 by D. Dvorsek, V. V. Kabanov, J. Demsar +6 · 3 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.66.020510

published as Phys. Rev. B 66, 020510 (2002) · 4 pages, 4 figures

arxiv created 2002/05/27 · openalex publication_date 2002/07/24 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Femtosecond pump probe experiments are reported on quasiparticle relaxation and recombination in YSr_xBa_2\ensuremath-xCu₄O₈ as a function of temperature and polarization. The data show a two-component relaxation similar to YBa₂Cu₃O_7\ensuremath-\ensuremathδ, one component being associated with the superconducting transition, and the other with the pseudogap below T^*. The relaxation time \ensuremathτ_p associated with the pseudogap is found to be T independent, while the relaxation time \ensuremathτ_G of the component observed only below T_c exhibits a clear divergence near T_c. A strong polarization anisotropy of the picosecond transient is observed below T_c which is attributed to the anisotropy of the probe transition matrix elements.

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