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Ultrafast X-ray imaging of the light-induced phase transition in VO2
Allan S. Johnson, Daniel Pérez-Salinas, Khalid M. Siddiqui +26
Using light to control transient phases in quantum materials is an emerging route to engineer new properties and functionality, with both thermal and non-thermal phases observed ou…
Does VO Host a Transient Monoclinic Metallic Phase?
Luciana Vidas, Daniel Schick, Elías Martínez +8
Ultrafast phase transitions induced by femtosecond light pulses present a new opportunity for manipulating the properties of materials. Understanding how these transient states are…
Ultrafast Carrier Dynamics in VO across the Pressure-Induced Insulator-to-Metal Transition
Johannes M. Braun, Harald Schneider, Manfred Helm +5
We utilize near-infrared pump and mid-infrared probe spectroscopy to investigate the ultrafast electronic response of pressurized VO. Distinct pump-probe signals and a pumping…
Instantaneous band gap collapse in photoexcited monoclinic VO due to photocarrier doping
Daniel Wegkamp, Marc Herzog, Lede Xian +8
Using femtosecond time-resolved photoelectron spectroscopy we demonstrate that photoexcitation transforms monoclinic VO quasi-instantaneously into a metal. Thereby, we exclude…
Non-congruence of thermally driven structural and electronic transition in VO2
Joyeeta Nag, Richard Haglund, Andrew Payzant +1
Coupled structural and electronic phase transitions underlie the multifunctional properties of strongly-correlated materials. For example, colossal magnetoresistance1,2 in manganit…