Femtosecond Quasiparticle and Phonon Dynamics in Superconducting YBa2Cu3O7 Studied by Wideband Terahertz Spectroscopy

A. Pashkin; M. Porer; M. Beyer; K. W. Kim; A. Dubroka; C. Bernhard; X. Yao; Y. Dagan; R. Hackl; A. Erb; J. Demsar; R. Huber; A. Leitenstorfer

doi:10.1103/PhysRevLett.105.067001

Femtosecond Quasiparticle and Phonon Dynamics in Superconducting YBa2Cu3O7 Studied by Wideband Terahertz Spectroscopy

Superconductivity 2010-08-04 v2

Authors: A. Pashkin , M. Porer , M. Beyer , K. W. Kim , A. Dubroka , C. Bernhard , X. Yao , Y. Dagan , R. Hackl , A. Erb , J. Demsar , R. Huber , A. Leitenstorfer

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Abstract

We measure the anisotropic mid-infrared response of electrons and phonons in bulk YBa2Cu3O7 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.

Keywords

YBa2Cu3O7 femtosecond spectroscopy quasiparticle dynamics phonon dynamics electron-phonon scattering terahertz spectroscopy

Cite

@article{arxiv.1006.3539,
  title  = {Femtosecond Quasiparticle and Phonon Dynamics in Superconducting YBa2Cu3O7 Studied by Wideband Terahertz Spectroscopy},
  author = {A. Pashkin and M. Porer and M. Beyer and K. W. Kim and A. Dubroka and C. Bernhard and X. Yao and Y. Dagan and R. Hackl and A. Erb and J. Demsar and R. Huber and A. Leitenstorfer},
  journal= {arXiv preprint arXiv:1006.3539},
  year   = {2010}
}

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4 pages, 4 figures + supplementary material

Femtosecond Quasiparticle and Phonon Dynamics in Superconducting YBa2Cu3O7 Studied by Wideband Terahertz Spectroscopy

Abstract

Keywords

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