Transient spin density wave order induced in the normal state of BaFe 2 As 2 by coherent lattice oscillations
- Kim, Kyung Wan Department of Physics and Center for Applied Photonics, University of Konstanz, Germany - University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland - Department of Physics, Chungbuk National University, Cheongju, Korea
- Pashkin, A. Department of Physics and Center for Applied Photonics, University of Konstanz, Germany
- Schäfer, H. Department of Physics and Center for Applied Photonics, University of Konstanz, Germany
- Beyer, M. Department of Physics and Center for Applied Photonics, University of Konstanz, Germany
- Porer, M. Department of Physics and Center for Applied Photonics, University of Konstanz, Germany - Department of Physics, University of Regensburg, Germany
- Wolf, T. Karlsruhe Institute of Technology, Institute for Solid State Physics, Germany
- Bernhard, Christian University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
- Demsar, J. Department of Physics and Center for Applied Photonics, University of Konstanz, Germany - Complex Matter Department, Jozef Stefan Institute, Ljubljana, Slovenia
- Huber, R. Department of Physics and Center for Applied Photonics, University of Konstanz, Germany - Department of Physics, University of Regensburg, Germany
- Leitenstorfer, A. Department of Physics and Center for Applied Photonics, University of Konstanz, Germany - Department of Physics, University of Regensburg, Germany
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13.03.2013
Published in:
- EPJ Web of Conferences. - 2013, vol. 41, p. 03012
English
We trace the ultrafast dynamics of the spin density wave gap of the pnictide system BaFe2As2 probing resonantly with broadband multi-terahertz pulses. The photoexcitation in the low-temperature ground state leads to a fast suppression of the spin order followed by a slower recovery process. Surprisingly, in the normal state, we observe periodic oscillations of the spin density wave feature at a frequency as high as 5.5 THz. Our results indicate a transient development of a macroscopic order driven by a coherent lattice oscillation and attest to a pronounced spin–phonon coupling in pnictides.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 136723
- DOI 10.1051/epjconf/20134103012
- Persistent URL
- https://folia.unifr.ch/unifr/documents/303157
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