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.

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

FAUSTI, DANIELE;
2007-01-01

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2335074
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