Coherent amplitudon generation in K_0.3MoO_3 through ultrafast inter-band quasi particle decay

Abstract

The charge density wave system K_0.3MoO_3 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.

References in corpus (5)

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• A Raman study of the Charge-Density-Wave State in A${}_{0.3}$MoO${}_3$ (A = K,Rb)
• Phase-channel dynamics reveal the role of impurities and screening in a quasi-one-dimensional charge-density wave system
• Nonlinear order parameter oscillations and lattice coupling in strongly-driven charge-density-wave systems
• Time-resolved multimode heterodyne detection for dissecting coherent states of matter
• Detecting isotropic density and nematic fluctuations using ultrafast coherent phonon spectroscopy