Coherent Structural Dynamics and Electronic Correlations during an Ultrafast Insulator-to-Metal Phase Transition in
Top Cited Papers
- 13 September 2007
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 99 (11), 116401
- https://doi.org/10.1103/physrevlett.99.116401
Abstract
We directly trace the multi-THz conductivity of during an insulator-metal transition triggered by a 12-fs light pulse. The femtosecond dynamics of lattice and electronic degrees of freedom are spectrally discriminated. A coherent wave packet motion of V-V dimers at 6 THz modulates the lattice polarizability for approximately 1 ps. In contrast, the electronic conductivity settles to a constant value already after one V-V oscillation cycle. Based on our findings, we propose a qualitative model for the nonthermal phase transition.
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