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Ultrafast insulator-metal transition in VO<sub>2</sub> : interplay between coherent lattice motion and electronic correlations

Ultrafast insulator-metal transition in VO2 : interplay between coherent lattice motion and electronic correlations

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LEITENSTORFER, Alfred, Carl KÜBLER, Rene LOPEZ, Andrej HALABICA, Richard F. HAGLUND, Rupert HUBER, 2009. Ultrafast insulator-metal transition in VO2 : interplay between coherent lattice motion and electronic correlations. In: Physica Status Solidi (C) - Current Topics in Solid State Physics. Wiley-Blackwell. 6(1), pp. 149-151. ISSN 1862-6351. eISSN 1610-1642. Available under: doi: 10.1002/pssc.200879860

@article{Leitenstorfer2009Ultra-58370, title={Ultrafast insulator-metal transition in VO2 : interplay between coherent lattice motion and electronic correlations}, year={2009}, doi={10.1002/pssc.200879860}, number={1}, volume={6}, issn={1862-6351}, journal={Physica Status Solidi (C) - Current Topics in Solid State Physics}, pages={149--151}, author={Leitenstorfer, Alfred and Kübler, Carl and Lopez, Rene and Halabica, Andrej and Haglund, Richard F. and Huber, Rupert} }

The multi-THz conductivity of VO<sub>2</sub> recorded during a photoinduced insulator-metal transition directly reveals the femtosecond dynamics of V-V stretching modes and electronic correlations. The strongly correlated character of the electronic system leads to a transient behaviour of the conductivity that cannot be understood in a Born-Oppenheimer picture. Based on our measurements with a time resolution of 12 fs and recent theoretical simulations for the electronic structure in steady state, we suggest a novel qualitative model for the non-thermal phase transition. The extremely high speed for the photoinduced phase transition is elegantly explained via a directed wave packet motion in the electronically excited state of the dimer that transfers the crystal structure of the insulator into the configuration of the metallic phase. Kübler, Carl Lopez, Rene Leitenstorfer, Alfred Kübler, Carl Halabica, Andrej Ultrafast insulator-metal transition in VO<sub>2</sub> : interplay between coherent lattice motion and electronic correlations Halabica, Andrej 2022-08-23T08:16:15Z 2022-08-23T08:16:15Z Haglund, Richard F. Leitenstorfer, Alfred 2009 Haglund, Richard F. Huber, Rupert eng Lopez, Rene Huber, Rupert

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