Ultrafast dynamics during the photoinduced phase transition in VO 2

Progress in Surface Science（2015）

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摘要

•Fs time-resolved spectroscopy of the photoinduced phase transition (PIPT) of VO2.•Photoexcitation causes a structural and an electronic branch of the PIPT.•Screening change causes instantaneous band gap collapse preceding carrier cooling.•Abrupt lattice potential change launches ionic motion over multiple timescales.•Comparability of critical fluences of PIPT: a discussion.

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关键词

CB,CIA,COHSEX,CPT,DFT,DMFT,DOS,FWHM,FT,HSE,IMT,LDA,LPC,LSDA,MD,mM,mTHz,PES,PIPT,PLD,R,UED,UHV,VB,VO2,WLC

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