Abstract
Using time- and angle-resolved photoemission spectroscopy, we investigate the photoexcited electron dynamics in a prototypical charge density wave (CDW) material, Rb0.3MoO3. We observe a pronounced slow relaxation component within the CDW-gap energies. This anomalously slow dynamics is independent of the wave number, and cannot be explained by the presence of impurities. We propose that phase-coherent domains are temporarily established after a transient closure of the CDW gap, and that the intragap excitations are attributed to relaxation of the domain boundaries.
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