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Controlled vaporization of the superconducting condensate in cuprate superconductors by femtosecond photoexcitation

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2008

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Kusar, Primoz
Mertelj, Tomaz
Sugai, Shunji
Mihailovic, Dragan

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http://nbn-resolving.de/urn:nbn:de:bsz:352-171834
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https://doi.org/10.1103/PhysRevLett.101.227001
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Physical Review Letters. 2008, 101(22). ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.101.227001

Zusammenfassung

We use ultrashort intense laser pulses to study superconducting state vaporization dynamics in La2-xSrxCuO4 (x=0.1 and 0.15) on the femtosecond time scale. We find that the energy density required to vaporize the superconducting state is 2.0±0.8 and 2.6±1.0  K/Cu for x=0.1 and 0.15, respectively. This is significantly greater than the condensation energy density, indicating that the quasiparticles share a large amount of energy with the boson glue bath on this time scale. Considering in detail both spin and lattice energy relaxation pathways which take place on the relevant time scale of ∼10-12  s, the experiments appear to favor phonon-mediated pair-breaking mechanisms over spin-mediated pair breaking.

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ISO 690KUSAR, Primoz, Viktor V. KABANOV, Jure DEMSAR, Tomaz MERTELJ, Shunji SUGAI, Dragan MIHAILOVIC, 2008. Controlled vaporization of the superconducting condensate in cuprate superconductors by femtosecond photoexcitation. In: Physical Review Letters. 2008, 101(22). ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.101.227001
BibTex
@article{Kusar2008Contr-17183,
  year={2008},
  doi={10.1103/PhysRevLett.101.227001},
  title={Controlled vaporization of the superconducting condensate in cuprate superconductors by femtosecond photoexcitation},
  number={22},
  volume={101},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Kusar, Primoz and Kabanov, Viktor V. and Demsar, Jure and Mertelj, Tomaz and Sugai, Shunji and Mihailovic, Dragan}
}
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