Ultrafast Electronic Dynamics and Laser-Induced Incoherence in 1T”-TaTe₂

The interplay between lattice distortion and electronic correlations in transition-metal dichalcogenides (TMDs) gives rise to diverse charge-ordered ground states and ultrafast collective dynamics. We present time-resolved angle-resolved photoemission spectroscopy (tr-ARPES) measurements on the low-temperature 3×3 phase of 1T″-TaTe₂ using a 1.55 eV pump and 21.3 eV high-harmonic probe. The melting of the gaps which arise due to low temperature phase transition and its dynamics are studied as a function of laser fluence, pointing to the different role of the lattice and electronic degrees of freedom. The implication of these results for establishing the nature of the quasi-1D charge order is discussed.