Femtosecond response of quasiparticles and phonons in superconducting YBa₂Cu₃O7-δ studied by wideband terahertz spectroscopy
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Pashkin, A.
Department of Physics and Center for Applied Photonics, University of Konstanz, Germany
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Porer, M.
Department of Physics and Center for Applied Photonics, University of Konstanz, Germany
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Beyer, M.
Department of Physics and Center for Applied Photonics, University of Konstanz, Germany
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Kim, Kyung Wan
Department of Physics and Center for Applied Photonics, University of Konstanz, Germany - Department of Physics, University of Fribourg, Switzerland
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Dubroka, Adam
Department of Physics, University of Fribourg, Switzerland
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Bernhard, Christian
Department of Physics, University of Fribourg, Switzerland
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Yao, X.
Department of Physics, Shanghai Jiao Tong University, Shanghai, China
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Dagan, Y.
Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Israel
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Hackl, R.
Walther-Meissner-Institut, Garching, Germany
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Erb, A.
Walther-Meissner-Institut, Garching, Germany
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Demsar, J.
Department of Physics and Center for Applied Photonics, University of Konstanz, Germany - Complex Matter Department, Jozef Stefan Institute, Ljubljana, Slovenia
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Huber, R.
Department of Physics and Center for Applied Photonics, University of Konstanz, Germany
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Leitenstorfer, A.
Department of Physics and Center for Applied Photonics, University of Konstanz, Germany
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Published in:
- Physical Review Letters. - 2010, vol. 105, no. 6, p. 067001
English
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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Faculty
- Faculté des sciences et de médecine
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Department
- Département de Physique
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Language
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Classification
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Physics
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License
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License undefined
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Identifiers
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Persistent URL
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https://folia.unifr.ch/unifr/documents/301732
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