Coherent amplitudon generation in K₀.3MoO₃ through ultrafast inter-band quasi particle decay
Sagar, D. M. · Tsvetkov, A. A. · Fausti, D. · van Smaalen, S. · van Loosdrecht, P. H. M.
Original · EN
The charge density wave system K₀.3MoO₃ has been studied using variable energy pump-probe spectroscopy, ellipsometry, and inelastic light scattering. The observed transient reflectivity response exhibits quite a complex behavior, 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.
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