Femtosecond Response of Quasiparticles and Phonons in Superconducting YBa2Cu3O7-delta Studied by Wideband Terahertz Spectroscopy

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PhysRevLett.105.067001.pdf
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2010
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Pashkin, Alexej
Kim, Kyungwan
Dubroka, Adam
Bernhard, Christian
Yao, Xin
Dagan, Yoram
Hackl, Rudi
Erb, Andreas
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We measure the anisotropic midinfrared response of electrons and phonons in bulk YBa2Cu3O7-δ after femtosecond photoexcitation. A line shape analysis of specific lattice modes reveals their transient occupation and coupling to the superconducting condensate. The apex oxygen vibration is strongly excited within 150 fs, demonstrating that the lattice absorbs a major portion of the pump energy before the quasiparticles are thermalized. Our results attest to substantial electron-phonon scattering and introduce a powerful concept probing electron-lattice interactions in a variety of complex materials.

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ISO 690PASHKIN, Alexej, Michael PORER, Markus BEYER, Kyungwan KIM, Adam DUBROKA, Christian BERNHARD, Xin YAO, Yoram DAGAN, Rudi HACKL, Andreas ERB, Jure DEMSAR, Rupert HUBER, Alfred LEITENSTORFER, 2010. Femtosecond Response of Quasiparticles and Phonons in Superconducting YBa2Cu3O7-delta Studied by Wideband Terahertz Spectroscopy. In: Physical Review Letters. 2010, 105, 067001. Available under: doi: 10.1103/PhysRevLett.105.067001
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@article{Pashkin2010Femto-5256,
  year={2010},
  doi={10.1103/PhysRevLett.105.067001},
  title={Femtosecond Response of Quasiparticles and Phonons in Superconducting YBa2Cu3O7-delta Studied by Wideband Terahertz Spectroscopy},
  volume={105},
  journal={Physical Review Letters},
  author={Pashkin, Alexej and Porer, Michael and Beyer, Markus and Kim, Kyungwan and Dubroka, Adam and Bernhard, Christian and Yao, Xin and Dagan, Yoram and Hackl, Rudi and Erb, Andreas and Demsar, Jure and Huber, Rupert and Leitenstorfer, Alfred},
  note={Article Number: 067001}
}
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