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Novelli F, De Filippis G, Cataudella V, et al. Witnessing the formation and relaxation of dressed quasi-particles in a strongly correlated electron system. Nat Commun. 2014;5:5112doi: 10.1038/ncomms6112.
Novelli, F., De Filippis, G., Cataudella, V., Esposito, M., Vergara, I., Cilento, F., Sindici, E., Amaricci, A., Giannetti, C., Prabhakaran, D., Wall, S., Perucchi, A., Dal Conte, S., Cerullo, G., Capone, M., Mishchenko, A., Grüninger, M., Nagaosa, N., Parmigiani, F., & Fausti, D. (2014). Witnessing the formation and relaxation of dressed quasi-particles in a strongly correlated electron system. Nature communications, 55112. https://doi.org/10.1038/ncomms6112
Novelli, Fabio, et al. "Witnessing the formation and relaxation of dressed quasi-particles in a strongly correlated electron system." Nature communications vol. 5 (2014): 5112. doi: https://doi.org/10.1038/ncomms6112
Novelli F, De Filippis G, Cataudella V, Esposito M, Vergara I, Cilento F, Sindici E, Amaricci A, Giannetti C, Prabhakaran D, Wall S, Perucchi A, Dal Conte S, Cerullo G, Capone M, Mishchenko A, Grüninger M, Nagaosa N, Parmigiani F, Fausti D. Witnessing the formation and relaxation of dressed quasi-particles in a strongly correlated electron system. Nat Commun. 2014 Oct 07;5:5112. doi: 10.1038/ncomms6112. PMID: 25290587.
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Nat Commun. 2014 Oct 07;5:5112. doi: 10.1038/ncomms6112.

Witnessing the formation and relaxation of dressed quasi-particles in a strongly correlated electron system.

Nature communications

Fabio Novelli, Giulio De Filippis, Vittorio Cataudella, Martina Esposito, Ignacio Vergara, Federico Cilento, Enrico Sindici, Adriano Amaricci, Claudio Giannetti, Dharmalingam Prabhakaran, Simon Wall, Andrea Perucchi, Stefano Dal Conte, Giulio Cerullo, Massimo Capone, Andrey Mishchenko, Markus Grüninger, Naoto Nagaosa, Fulvio Parmigiani, Daniele Fausti

Affiliations

  1. 1] Dipartimento di Fisica, Università degli Studi di Trieste, Via Valerio 2, 34127 Trieste, Italy [2] Elettra-Sincrotrone Trieste S.C.p.A., 34149 Basovizza, Italy.
  2. SPIN-CNR and Dipartimento di Fisica, Università di Napoli Federico II, I-80126 Napoli, Italy.
  3. Dipartimento di Fisica, Università degli Studi di Trieste, Via Valerio 2, 34127 Trieste, Italy.
  4. II. Physikalisches Institut, Universität zu Köln, 50937 Köln, Germany.
  5. Elettra-Sincrotrone Trieste S.C.p.A., 34149 Basovizza, Italy.
  6. CNR-IOM Democritos National Simulation Center and Scuola Internazionale Superiore di Studi Avanzati (SISSA), Via Bonomea 265, 34136 Trieste, Italy.
  7. 1] I-LAMP (Interdisciplinary Laboratories for Advanced Materials Physics), Università Cattolica del Sacro Cuore, I-25121 Brescia, Italy [2] Department of Physics, Università Cattolica del Sacro Cuore, I-25121 Brescia, Italy.
  8. Department of Physics, University of Oxford, Oxford OX1 3PU, UK.
  9. ICFO-Institut de Ciencies Fotoniques, Av. Carl Friedrich Gauss, 3, Castelldefels, 08860 Barcelona, Spain.
  10. 1] Elettra-Sincrotrone Trieste S.C.p.A., 34149 Basovizza, Italy [2] INSTM UdR Trieste-ST, 34149 Basovizza, Italy.
  11. IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy.
  12. 1] RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan [2] RRC 'Kurchatov Institute', 123182 Moscow, Russia.
  13. 1] RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan [2] Department of Applied Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
  14. 1] Dipartimento di Fisica, Università degli Studi di Trieste, Via Valerio 2, 34127 Trieste, Italy [2] Elettra-Sincrotrone Trieste S.C.p.A., 34149 Basovizza, Italy [3] II. Physikalisches Institut, Universität zu Köln, 50937 Köln, Germany.

PMID: 25290587 DOI: 10.1038/ncomms6112

Abstract

The non-equilibrium approach to correlated electron systems is often based on the paradigm that different degrees of freedom interact on different timescales. In this context, photo-excitation is treated as an impulsive injection of electronic energy that is transferred to other degrees of freedom only at later times. Here, by studying the ultrafast dynamics of quasi-particles in an archetypal strongly correlated charge-transfer insulator (La2CuO(4+δ)), we show that the interaction between electrons and bosons manifests itself directly in the photo-excitation processes of a correlated material. With the aid of a general theoretical framework (Hubbard-Holstein Hamiltonian), we reveal that sub-gap excitation pilots the formation of itinerant quasi-particles, which are suddenly dressed by an ultrafast reaction of the bosonic field.

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