Coherent structural dynamics and electronic correlations during an ultrafast insulator-to-metal phase transition in VO2

Kübler, Carl; Ehrke, Henri; Lopez, Rene; Halabica, Andrej; Haglund, Richard F.; Leitenstorfer, Alfred

Coherent structural dynamics and electronic correlations during an ultrafast insulator-to-metal phase transition in VO2

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Datum

2007

Autor:innen

Kübler, Carl

Ehrke, Henri

Lopez, Rene

Halabica, Andrej

Haglund, Richard F.

Leitenstorfer, Alfred

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review Letters. 2007, 99(11). ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.99.116401

Zusammenfassung

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.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

KÜBLER, Carl, Henri EHRKE, Rene LOPEZ, Andrej HALABICA, Richard F. HAGLUND, Alfred LEITENSTORFER, 2007. Coherent structural dynamics and electronic correlations during an ultrafast insulator-to-metal phase transition in VO2. In: Physical Review Letters. 2007, 99(11). ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.99.116401

BibTex

@article{Kubler2007Coher-16693,
  year={2007},
  doi={10.1103/PhysRevLett.99.116401},
  title={Coherent structural dynamics and electronic correlations during an ultrafast insulator-to-metal phase transition in VO2},
  number={11},
  volume={99},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Kübler, Carl and Ehrke, Henri and Lopez, Rene and Halabica, Andrej and Haglund, Richard F. and Leitenstorfer, Alfred}
}

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