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Huber T, Mariager SO, Ferrer A, et al. Coherent structural dynamics of a prototypical charge-density-wave-to-metal transition. Phys Rev Lett. 2014;113(2):026401doi: 10.1103/PhysRevLett.113.026401.
Huber, T., Mariager, S. O., Ferrer, A., Schäfer, H., Johnson, J. A., Grübel, S., Lübcke, A., Huber, L., Kubacka, T., Dornes, C., Laulhe, C., Ravy, S., Ingold, G., Beaud, P., Demsar, J., & Johnson, S. L. (2014). Coherent structural dynamics of a prototypical charge-density-wave-to-metal transition. Physical review letters, 113(2), 026401. https://doi.org/10.1103/PhysRevLett.113.026401
Huber, T, et al. "Coherent structural dynamics of a prototypical charge-density-wave-to-metal transition." Physical review letters vol. 113,2 (2014): 026401. doi: https://doi.org/10.1103/PhysRevLett.113.026401
Huber T, Mariager SO, Ferrer A, Schäfer H, Johnson JA, Grübel S, Lübcke A, Huber L, Kubacka T, Dornes C, Laulhe C, Ravy S, Ingold G, Beaud P, Demsar J, Johnson SL. Coherent structural dynamics of a prototypical charge-density-wave-to-metal transition. Phys Rev Lett. 2014 Jul 11;113(2):026401. doi: 10.1103/PhysRevLett.113.026401. Epub 2014 Jul 11. PMID: 25062214.
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Phys Rev Lett. 2014 Jul 11;113(2):026401. doi: 10.1103/PhysRevLett.113.026401. Epub 2014 Jul 11.

Coherent structural dynamics of a prototypical charge-density-wave-to-metal transition.

Physical review letters

T Huber, S O Mariager, A Ferrer, H Schäfer, J A Johnson, S Grübel, A Lübcke, L Huber, T Kubacka, C Dornes, C Laulhe, S Ravy, G Ingold, P Beaud, J Demsar, S L Johnson

Affiliations

  1. Institute for Quantum Electronics, Physics Department, ETH Zurich, CH-8093 Zurich, Switzerland.
  2. Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
  3. Institute for Quantum Electronics, Physics Department, ETH Zurich, CH-8093 Zurich, Switzerland and Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
  4. Physics Department, Universität Konstanz, D-78457 Konstanz, Germany.
  5. Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland and Laboratoire de Spectroscopie Ultrarapide, EPF Lausanne, CH-1015 Lausanne, Switzerland.
  6. Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, FR-91192 Gif-sur-Yvette Cedex, France and Université Paris-Sud, 91405 Orsay Cedex, France.
  7. Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, FR-91192 Gif-sur-Yvette Cedex, France.
  8. Physics Department, Universität Konstanz, D-78457 Konstanz, Germany and Institute of Physics, Ilmenau University of Technology, D-98693 Ilmenau, Germany.

PMID: 25062214 DOI: 10.1103/PhysRevLett.113.026401

Abstract

Using femtosecond time-resolved x-ray diffraction, we directly monitor the coherent lattice dynamics through an ultrafast charge-density-wave-to-metal transition in the prototypical Peierls system K(0.3)MoO(3) over a wide range of relevant excitation fluences. While in the low fluence regime we directly follow the structural dynamics associated with the collective amplitude mode; for fluences above the melting threshold of the electronic density modulation we observe a transient recovery of the periodic lattice distortion. We can describe these structural dynamics as a motion along the coordinate of the Peierls distortion triggered by the prompt collapse of electronic order after photoexcitation. The results indicate that the dynamics of a structural symmetry-breaking transition are determined by a high-symmetry excited state potential energy surface distinct from that of the initial low-temperature state.

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