Probing Light-induced Superconductivity with Ultrafast Transport Technique
Max Planck Institute for the structure and dynamics of matter
Optically driven quantum materials exhibit a variety of non-equilibrium functional phenomena, which to date have been primarily studied with ultrafast optical, photoemission, X-Ray scattering and spectroscopy methods. However, little has been done to characterize their transient transport responses. Here, we combined photo-conductive switches and coplanar waveguide to generate, transport and probe picosecond-long current pulses. We utilized this technique to probe photo-excited K3C60, in which a transient phase with superconducting-like optical properties has been recently observed. We observed characteristic signatures of a photo-induced granular superconductivity, including nonlinear current-voltage responses. This work opens up the possibility of systematic transport measurements in driven quantum materials, both to probe their properties and to integrate them into ultrafast optoelectronic platforms.
Reference : E. Wang et al., arXiv:2301.06425
Brief CV of Dr. Eryin Wang:
Eryin Wang is currently a staff scientist at Max Planck Institute for the structure and dynamics of matter (MPSD) at Hamburg, Germany. He received his PhD from Tsinghua University in 2017 and was awarded Chorafas prize for his PhD work. Then he worked as a postdoc at MPSD with Humboldt Fellowship. Since 2021, he worked as a staff scientist at MPSD. He is interested in studying non-equilibrium transport response of driven quantum material with newly developed ultrafast transport technique.
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