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Eichberger M, Schäfer H, Krumova M, et al. Snapshots of cooperative atomic motions in the optical suppression of charge density waves. Nature. 2010;468(7325):799-802doi: 10.1038/nature09539.
Eichberger, M., Schäfer, H., Krumova, M., Beyer, M., Demsar, J., Berger, H., Moriena, G., Sciaini, G., & Miller, R. J. (2010). Snapshots of cooperative atomic motions in the optical suppression of charge density waves. Nature, 468(7325), 799-802. https://doi.org/10.1038/nature09539
Eichberger, Maximilian, et al. "Snapshots of cooperative atomic motions in the optical suppression of charge density waves." Nature vol. 468,7325 (2010): 799-802. doi: https://doi.org/10.1038/nature09539
Eichberger M, Schäfer H, Krumova M, Beyer M, Demsar J, Berger H, Moriena G, Sciaini G, Miller RJ. Snapshots of cooperative atomic motions in the optical suppression of charge density waves. Nature. 2010 Dec 09;468(7325):799-802. doi: 10.1038/nature09539. Epub 2010 Nov 24. PMID: 21107321.
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Nature. 2010 Dec 09;468(7325):799-802. doi: 10.1038/nature09539. Epub 2010 Nov 24.

Snapshots of cooperative atomic motions in the optical suppression of charge density waves.

Nature

Maximilian Eichberger, Hanjo Schäfer, Marina Krumova, Markus Beyer, Jure Demsar, Helmuth Berger, Gustavo Moriena, Germán Sciaini, R J Dwayne Miller

Affiliations

  1. Physics Department and Center of Applied Photonics and Zukunftskolleg, University of Konstanz, D-78457 Konstanz, Germany.

PMID: 21107321 DOI: 10.1038/nature09539

Abstract

Macroscopic quantum phenomena such as high-temperature superconductivity, colossal magnetoresistance, ferrimagnetism and ferromagnetism arise from a delicate balance of different interactions among electrons, phonons and spins on the nanoscale. The study of the interplay among these various degrees of freedom in strongly coupled electron-lattice systems is thus crucial to their understanding and for optimizing their properties. Charge-density-wave (CDW) materials, with their inherent modulation of the electron density and associated periodic lattice distortion, represent ideal model systems for the study of such highly cooperative phenomena. With femtosecond time-resolved techniques, it is possible to observe these interactions directly by abruptly perturbing the electronic distribution while keeping track of energy relaxation pathways and coupling strengths among the different subsystems. Numerous time-resolved experiments have been performed on CDWs, probing the dynamics of the electronic subsystem. However, the dynamics of the periodic lattice distortion have been only indirectly inferred. Here we provide direct atomic-level information on the structural dynamics by using femtosecond electron diffraction to study the quasi two-dimensional CDW system 1T-TaS(2). Effectively, we have directly observed the atomic motions that result from the optically induced change in the electronic spatial distribution. The periodic lattice distortion, which has an amplitude of ∼0.1 Å, is suppressed by about 20% on a timescale (∼250 femtoseconds) comparable to half the period of the corresponding collective mode. These highly cooperative, electronically driven atomic motions are accompanied by a rapid electron-phonon energy transfer (∼350 femtoseconds) and are followed by fast recovery of the CDW (∼4 picoseconds). The degree of cooperativity in the observed structural dynamics is remarkable and illustrates the importance of obtaining atomic-level perspectives of the processes directing the physics of strongly correlated systems.

References

  1. Phys Rev Lett. 2005 Mar 4;94(8):087202 - PubMed
  2. Phys Rev Lett. 2006 Aug 11;97(6):067402 - PubMed
  3. Phys Rev Lett. 2009 Feb 13;102(6):066404 - PubMed
  4. Phys Rev Lett. 2010 Aug 6;105(6):066402 - PubMed
  5. Nature. 2009 Mar 5;458(7234):56-9 - PubMed
  6. Science. 2003 Nov 21;302(5649):1382-5 - PubMed
  7. Nature. 2007 Sep 6;449(7158):72-4 - PubMed
  8. Science. 2007 Feb 2;315(5812):633-6 - PubMed
  9. Phys Rev Lett. 2001 Jul 2;87(1):017401 - PubMed
  10. Nature. 2003 Mar 20;422(6929):287-9 - PubMed
  11. Phys Rev Lett. 2008 Nov 28;101(22):227001 - PubMed
  12. Phys Rev Lett. 2007 Sep 14;99(11):116401 - PubMed
  13. Phys Rev Lett. 2009 May 1;102(17):175503 - PubMed
  14. Chemphyschem. 2009 Jan 12;10(1):28-43 - PubMed
  15. Science. 2008 Sep 19;321(5896):1649-52 - PubMed
  16. Acta Crystallogr A. 2010 Mar;66(Pt 2):137-56 - PubMed
  17. Phys Rev Lett. 2009 Oct 9;103(15):155702 - PubMed
  18. Nat Mater. 2008 Dec;7(12):960-5 - PubMed
  19. Phys Rev Lett. 2008 Dec 12;101(24):246402 - PubMed

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