Ultrafast Hot Electron Induced Phase Transitions in Vanadium Dioxide
1 Max Planck Research Department for Structural Dynamics, Center for Free Electron Laser Science, University of Hamburg, c/o DESY, Notkestrasse 85, Hamburg, 22607, Germany
2 Quantum Science and Engineering Center, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
3 Department of Physics and Astronomy, Vanderbilt University, Nashville TN 37235-1807 USA
The Au/Cr/VO2/Si system was investigated in pump–probe experiments. Hot-electrons generated in the Au were found to penetrate into the underlying VO2 and couple with its lattice inducing a semiconductor-to-metal phase transition in ~2 picoseconds.
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