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- W3025280787 abstract "The emergent properties of quantum materials, such as symmetry-broken phases and associated spectral gaps, can be effectively manipulated by ultrashort photon pulses. Impulsive optical excitation generally results in a complex non-equilibrium electron and lattice dynamics that involves multiple processes on distinct timescales, and a common conception is that for times shorter than about 100 fs the gap in the electronic spectrum is not seriously affected by lattice vibrations. Here, we directly monitor the photo-induced collapse of the spectral gap in a canonical charge-density-wave material, blue bronze Rb0.3MoO3. We find that ultra-fast (about 60 fs) vibrational disordering due to efficient hot-electron energy dissipation quenches the gap significantly faster than the typical structural bottleneck time corresponding to one half-cycle oscillation (about 315 fs) of the coherent charge-density-wave amplitude mode. This result not only demonstrates the importance of incoherent lattice motion in the photo-induced quenching of electronic order, but also resolves the perennial debate about the nature of the spectral gap in a coupled electron-lattice system." @default.
- W3025280787 created "2020-05-21" @default.
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- W3025280787 date "2020-12-30" @default.
- W3025280787 modified "2023-10-16" @default.
- W3025280787 title "Bypassing the Structural Bottleneck in the Ultrafast Melting of Electronic Order" @default.
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- W3025280787 doi "https://doi.org/10.1103/physrevlett.125.266402" @default.
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