Research data supporting ''Imaging the coherent propagation of collective modes in the excitonic insulator Ta2NiSe5 at room temperature''

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Andrich, Paolo 
Murakami, Yuta 
Golez, Denis 
Remez, Benjamin 

Using a widefield pump-probe microscope (with ~10 nm spatial precision and ~10 fs time resolution) we probe the temperature and fluence dependent dynamics of the collective modes in excitonic insulator candidate Ta2NiSe5. We pump with a broadband pulse centered around 500 nm and probe ~800 nm using a bandpass filter.

Software / Usage instructions
Matlab, Adobe Illustrator, Text editor. Data underlying figs 1-3 are included as csv files and .mat files, and data for figure 5 is ipynb. Data is in units as shown in the main text.
spectroscopy, excitonic insulator, phase transition, collective modes
Engineering and Physical Sciences Research Council (EP/P034616/1)
European Research Council (758826)
Engineering and Physical Sciences Research Council (EP/M006360/1)
The calculations were run on the Beo05 cluster at the University of Fribourg. We acknowledge the CECAM workshop “Excitonic insulator: New perspectives in long-range interacting systems” at EPFL Lausanne for insights and discussions and for providing the opportunity to start this collaboration. We also thank A. Boris (Max Planck Institute for Solid State Research) and A. Musser (Cornell University) for helpful discussions. Funding: H.M.B., P.A., and A.R. acknowledge support from the Winton Programme for the Physics of Sustainability, the Engineering and Physical Sciences Research Council, and the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement 758826). N.R.C. acknowledges funding from the Engineering and Physical Sciences Research Council (EPSRC grant no. EP/P034616/1). Y.M. thanks the Japan Society for the Promotion of Science and the Japan Science and Technology Agency for funding through KAKENHI grant no. JP19K23425 and JST CREST grant no. JPMJCR1901. P.W. acknowledges funding from the ERC Consolidator grant no. 724103 and from the Swiss National Science Foundation via NCCR Marvel. A.K.S. thanks the Department of Science and Technology, India for support under Nanomission and Year of Science Professorship. L.H. acknowledges the financial support from the Department of Science and Technology (DST), India [grant no. SR/WOS-A/PM-33/2018 (G)] and IISER Pune for providing the facilities for crystal growth and characterization. B.R. acknowledges support from the Cambridge International Trust and Wolfson College, Cambridge. D.G. is supported by the Slovenian Research Agency (ARRS) under program nos. P1-0044 and J1-2455. N.R.C., A.J.M., and D.G. acknowledge support from the Simons Foundation.