Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 19, Issue 34, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/19/34/346208
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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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