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Title: Evidence for photoinduced insulator-to-metal transition in B-phase vanadium dioxide
Authors: Lourembam, James
Srivastava, Amar
La-o-vorakiat, Chan
Cheng, Liang
Venkatesan, T.
Chia, Elbert Ee Min
Keywords: Vanadium Dioxide
Metal-insulator Transition
Issue Date: 2016
Source: Lourembam, J., Srivastava, A., La-o-vorakiat, C., Cheng, L., Venkatesan, T., & Chia, E. E. M. (2016). Evidence for photoinduced insulator-to-metal transition in B-phase vanadium dioxide. Scientific Reports, 6, 25538-. doi:10.1038/srep25538
Series/Report no.: Scientific Reports
Abstract: Ultrafast optical studies have been performed on epitaxial films of the novel B-phase of vanadium dioxide using temperature-dependent optical pump-probe technique. Signature of temperature-driven metal-to-insulator transition was distinctly observed in the ultrafast dynamics — the insulating phase showed two characteristic electronic relaxation times while the metallic phase showed only one. Beyond a threshold value of the pump fluence, the insulating state collapses into a ‘metallic-like’ phase which can be further subdivided into two regimes according to the lengths of the fast characteristic time. The first regime can be explained by lattice heating due to the optical pump; the other cannot be accounted by simple lattice heating effects alone, and thus offers evidence for a true photoinduced phase transition.
DOI: 10.1038/srep25538
Schools: School of Physical and Mathematical Sciences 
Rights: © 2016 The Authors (Nature Publishing Group). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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