Femtosecond Structural Dynamics in VO2 During an Ultrafast Solid-Solid Phase Transition

Overview

Journal Phys Rev Lett

Publisher American Physical Society

Specialty Biophysics

Date 2001 Dec 12

PMID 11736474

Citations 88

Authors

A Cavalleri

C Toth

C W Siders

J A Squier

F Raksi

P Forget

J C Kieffer

Affiliations

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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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