منابع مشابه
Ultrafast Dynamics of Single Crystal and Polycrystalline VO2
In recent decades, interest has rapidly developed in the group of materials known as strongly correlated electron systems. These systems exhibit numerous startling behaviors ranging from high temperature superconductivity to the topic of this thesis: metalinsulator transitions, specifically in the material vanadium dioxide (VO2). Unfortunately, due to wide variations within and between sampl...
متن کاملFemtosecond Structural Dynamics in VO2 during an Ultrafast Solid-Solid Phase Transition.
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 o...
متن کاملUltrafast X - ray Studies of Structural Dynamics
C20 of molecular structures for C70Br10 or C60Cl24, which have been later confirmed by X-ray crystallography (partially with the use of synchrotron radiation). For the mixture of two compounds with known X-ray structures, C60Cl28 and C60Cl30, the experimental IR spectra were interpreted by comparison with the calculated ones using subtle differences for compounds possessing very similar structu...
متن کاملUltrafast structural dynamics of photoexcited adenine.
We report deep UV initiated excited state dynamics of the canonical nucleobase adenine (Ade) through Resonance Raman (RR) intensity analysis. RR spectra of Ade at excitation wavelengths throughout the Bb absorption band in the 210-230 nm wavelength range are measured and subsequently converted to scattering cross-sections. The time-dependent wave packet (TDWP) formalism has been employed for se...
متن کاملStudying the Ultrafast Dynamics of the Insulator-Metal Transition in Single Crystal VO2
The focus of my research project this summer was towards the investigation of the insulatormetal transition dynamics of vanadium dioxide. A summary of the currently known, as well as debated, properties of the material is given here. Also given are the various experimental details involved in the measurements. We used femtosecond pulses in pump-probe experimentation to achieve time-resolved ref...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2017
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.96.075128