Femtosecond response of quasiparticles and phonons in superconducting YBa2Cu3O7-δ 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 response of quasiparticles and phonons in superconducting YBa₂Cu₃O₇-δ 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

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

122 Scopus citations

Abstract

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.

Original language	English
Article number	067001
Journal	Physical Review Letters
Volume	105
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.105.067001
State	Published - 2 Aug 2010

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Pashkin, A., Porer, M., Beyer, M., Kim, K. W., Dubroka, A., Bernhard, C., Yao, X., Dagan, Y., Hackl, R., Erb, A., Demsar, J., Huber, R., & Leitenstorfer, A. (2010). Femtosecond response of quasiparticles and phonons in superconducting YBa₂Cu₃O₇-δ studied by wideband terahertz spectroscopy. Physical Review Letters, 105(6), Article 067001. https://doi.org/10.1103/PhysRevLett.105.067001

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abstract = "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.",

author = "A. Pashkin and M. Porer and M. Beyer and Kim, {K. W.} 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",

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Pashkin, A, Porer, M, Beyer, M, Kim, KW, Dubroka, A, Bernhard, C, Yao, X, Dagan, Y, Hackl, R, Erb, A, Demsar, J, Huber, R & Leitenstorfer, A 2010, 'Femtosecond response of quasiparticles and phonons in superconducting YBa₂Cu₃O₇-δ studied by wideband terahertz spectroscopy', Physical Review Letters, vol. 105, no. 6, 067001. https://doi.org/10.1103/PhysRevLett.105.067001

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T1 - Femtosecond response of quasiparticles and phonons in superconducting YBa2Cu3O7-δ studied by wideband terahertz spectroscopy

AU - Pashkin, A.

AU - Porer, M.

AU - Beyer, M.

AU - Kim, K. W.

AU - Dubroka, A.

AU - Bernhard, C.

AU - Yao, X.

AU - Dagan, Y.

AU - Hackl, R.

AU - Erb, A.

AU - Demsar, J.

AU - Huber, R.

AU - Leitenstorfer, A.

PY - 2010/8/2

Y1 - 2010/8/2

N2 - 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.

AB - 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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Femtosecond response of quasiparticles and phonons in superconducting YBa₂Cu₃O₇-δ studied by wideband terahertz spectroscopy

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