Coherent Structural Dynamics and Electronic Correlations during an Ultrafast Insulator-to-Metal Phase Transition in VO2
| Autor: | Huber, R., Haglund, R.F., Ehrke, H., Kübler, C., Lopez, R., Halabica, A., Leitenstorfer, A. |
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| Rok vydání: | 2007 |
| Předmět: | |
| DOI: | 10.5283/epub.19123 |
| Popis: | We directly trace the multi-THz conductivity of VO2 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. » This publication has been selected for the Virtual Journal of Ultrafast Science » This publication has been selected for the Virtual Journal of Nanoscale Science and Technology |
| Databáze: | OpenAIRE |
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