Coherent amplitudon generation in blue bronze through ultrafast interband quasi-particle decay

Dodderi M. Sagara*, Artem A. Tsvetkov, Daniele Fausti, Sander van Smaalen, Paul H. M. van Loosdrecht

*Corresponding author for this work

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Abstract

The charge density wave system K(0.3)MoO(3) has been studied using variable pulse energy pump-probe spectroscopy, ellipsometry, and inelastic light scattering. The observed transient reflectivity response exhibits quite a complex behaviour, containing contributions due to quasi-particle excitations, coherent amplitudons and phonons, and heating effects. The generation of coherent amplitudons is discussed in terms of relaxation of photo-excited quasi-particles, and is found to be resonant with the interband plasmon frequency. Two additional coherent excitations observed in the transients are assigned to zone-folding modes of the charge density wave state.

Original languageEnglish
Article number346208
Number of pages12
JournalJournal of Physics-Condensed Matter
Volume19
Issue number34
DOIs
Publication statusPublished - 29-Aug-2007

Keywords

  • CHARGE-DENSITY WAVES
  • COLLECTIVE EXCITATIONS
  • K0.3MOO3
  • STATE
  • CONDUCTIVITY

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