Femtosecond structural dynamics in VO2 during an ultrafast solid-solid phase transition - art. no. 237401

Authors
Cavalleri, A Toth, C Siders, CW Squier, JA Raksi, F Forget, P Kieffer, JC
Citation
A. Cavalleri et al., Femtosecond structural dynamics in VO2 during an ultrafast solid-solid phase transition - art. no. 237401, PHYS REV L, 8723(23), 2001, pp. 7401
Citations number
29
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
8723
Issue
23
Year of publication
2001
Database
ISI
SICI code
0031-9007(200112)8723:23<7401:FSDIVD>2.0.ZU;2-V
Abstract
Femtosecond x-ray and visible pulses were used to probe structural and elec tronic dynamics during an optically driven, solid-solid phase transition in VO2. For high interband electronic excitation (similar to5 x 10(21) cm(-3) ), a subpicosecond transformation into the high-T, rutile phase of the mate rial is observed, simultaneous with an insulator-to-metal transition. The f ast time scale observed suggests that, in this regime, the structural trans ition may not be thermally initiated.