Femtosecond quasiparticle relaxation dynamics and probe polarization anisotropy in YBa2Cu4O8

D. Dvorsek; V. V. Kabanov; J. Demsar; S. M. Kazakov J. Karpinski; D. Mihailovic

doi:10.1103/PhysRevB.66.020510

Femtosecond quasiparticle relaxation dynamics and probe polarization anisotropy in YBa2Cu4O8

Superconductivity 2008-11-19 v2 Strongly Correlated Electrons

Authors: D. Dvorsek , V. V. Kabanov , J. Demsar , S. M. Kazakov J. Karpinski , D. Mihailovic

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Abstract

Femtosecond pump probe experiments are reported on quasiparticle relaxation and recombination in YBa2Cu4O8 as a function of temperature and polarization. The data show a 2-component relaxation similar to YBa2Cu3O7-\delta, one component being assocated with the superconducting transition, and the other with the pseudogap below T* The relaxation time tau_p associated with the pseudogap is found to be T-independent, while the relaxation time tau_g of the component obseved only below Tc exhibits a clear divergence near Tc. A strong polarisation anisotropy of the picosecond transient is observed below Tc which is attributed to the anisotropy of the probe transition matrix elements.

Keywords

uniaxial multilayer steady-state fields surface wave impedance transfer function electromagnetic waves

Cite

@article{arxiv.cond-mat/0203614,
  title  = {Femtosecond quasiparticle relaxation dynamics and probe polarization anisotropy in YBa2Cu4O8},
  author = {D. Dvorsek and V. V. Kabanov and J. Demsar and S. M. Kazakov J. Karpinski and D. Mihailovic},
  journal= {arXiv preprint arXiv:cond-mat/0203614},
  year   = {2008}
}

Comments

4 pages, 4 figures

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