title: Femtosecond Structural Dynamics in VO2 during an Ultrafast Solid-Solid Phase Transition.
abstract: Femtosecond x-ray and visible pulses were used to probe structural and electronic dynamics during an optically driven, solid-solid phase transition in VO(2). For high interband electronic excitation (approximately 5 x 10(21) cm(-3)), a subpicosecond transformation into the high-T, rutile phase of the material is observed, simultaneous with an insulator-to-metal transition. The fast time scale observed suggests that, in this regime, the structural transition may not be thermally initiated.
authors.affiliation: University of California San Diego, La Jolla, California 92093-0339, USA. acavalleri@lbl.gov
authors.forename: A
authors.initials: A
authors.lastname: Cavalleri
authors.forename: C
authors.initials: C
authors.lastname: Tóth
authors.forename: C W
authors.initials: CW
authors.lastname: Siders
authors.forename: J A
authors.initials: JA
authors.lastname: Squier
authors.forename: F
authors.initials: F
authors.lastname: Ráksi
authors.forename: P
authors.initials: P
authors.lastname: Forget
authors.forename: J C
authors.initials: JC
authors.lastname: Kieffer