Femtosecond Structural Dynamics inVO2during an Ultrafast Solid-Solid Phase Transition

2001/11/16 by A. Cavalleri, Csaba Tóth, C. W. Siders +4 · 8 citations
Materials Science · Physics and Astronomy · #Transition Metal Oxide Nanomaterials #Photorefractive and Nonlinear Optics #Ga2O3 and related materials

paper · doi:10.1103/physrevlett.87.237401

openalex publication_date 2001/11/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04

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.

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