Is Ta2NiSe5 an Excitonic Insulator?

Presentations

• Almost zero-gap gap semiconductor/semimetal to insulator transition in layered chalcogenide Ta₂NiSe₅

  Invited

  March 17, 2021, 11:30 AM – March 17, 2021, 12:06 PM

  Presenters

  • Hidenori Takagi

    • University of Tokyo (Japan)
    • Max Planck Institute for Solid State Research
    • Max Planck Institute for Solid State Research, Stuttgart, Germany

  Authors

  • Hidenori Takagi

    • University of Tokyo (Japan)
    • Max Planck Institute for Solid State Research
    • Max Planck Institute for Solid State Research, Stuttgart, Germany

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• Band hybridization at the semimetal-semiconductor transition of Ta₂NiSe₅ enabled by mirror-symmetry breaking

  Invited

  March 17, 2021, 12:06 PM – March 17, 2021, 12:42 PM

  Presenters

  • Matthew D Watson

    • Diamond Light Source

  Authors

  • Matthew D Watson

    • Diamond Light Source

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• Spatial mapping of collective modes and time-resolved tracking of excitonic order melting in Ta₂NiSe₅ at room temperature

  Invited

  March 17, 2021, 12:42 PM – March 17, 2021, 1:18 PM

  Presenters

  • Hope Bretscher

    • Cavendish Laboratory, University of Cambridge

  Authors

  • Paolo Andrich

    • Cavendish Laboratory, University of Cambridge

  • Hope Bretscher

    • Cavendish Laboratory, University of Cambridge

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• Electronic phase diagram of the excitonic insulator candidates Ta₂Ni(Se_1-xS_x)₅ probed by Raman scattering

  Invited

  March 17, 2021, 1:18 PM – March 17, 2021, 1:54 PM

  Presenters

  • Pavel Volkov

    • Rutgers University
    • Department of Physics and Astronomy, Center for Materials Theory,Rutgers University, Piscataway, New Jersey 08854, USA
    • Physics and Astronomy, Rutgers University

  Authors

  • Pavel Volkov

    • Rutgers University
    • Department of Physics and Astronomy, Center for Materials Theory,Rutgers University, Piscataway, New Jersey 08854, USA
    • Physics and Astronomy, Rutgers University

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• The spontaneous symmetry breaking in Ta₂NiSe₅ is structural in nature

  Invited

  March 17, 2021, 1:54 PM – March 17, 2021, 2:30 PM

  Presenters

  • Nuh Gedik

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology

  Authors

  • Edoardo Baldini

    • Massachusetts Institute of Technology MIT

  • Alfred Zong

    • University of California, Berkeley
    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology

  • Dongsung Choi

    • Massachusetts Institute of Technology MIT

  • Changmin Lee

    • Lawrence Berkeley National Laboratory
    • Massachusetts Institute of Technology MIT

  • Marios H Michael

    • Harvard University

  • Lukas Windgaetter

    • Max Planck Institute for the Structure and Dynamics of Matter

  • Igor Mazin

    • Physics & Astronomy, George Mason University
    • Department of Physics and Astronomy, George Mason University
    • George Mason University
    • Physics and Astronomy, George Mason University
    • Physics, George Mason University
    • Department of Physics and Astronomy,, George Mason University
    • Department of Physics and Astronomy and Quantum Science and Engineering Center, George Mason University – Fairfax, VA, USA

  • Simone Latini

    • Max Planck Institute for the Structure and Dynamics of Matter

  • Doron Azoury

    • Massachusetts Institute of Technology MIT

  • Baiqing Lyu

    • Massachusetts Institute of Technology MIT

  • Anshul Kogar

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology

  • Yao Wang

    • Harvard University
    • Clemson University

  • Yangfan Lu

    • University of Tokyo

  • Tomohiro Takayama

    • University of Tokyo (Japan)
    • Max Planck Institute for Solid State Research

  • Hidenori Takagi

    • University of Tokyo (Japan)
    • Max Planck Institute for Solid State Research
    • Max Planck Institute for Solid State Research, Stuttgart, Germany

  • Andrew Millis

    • Columbia University
    • Department of Physics, Columbia University
    • Flatiron Institute
    • Columbia Univ
    • Center for Computational Quantum Physics, Flatiron Institute
    • Flatiron Institute; Columbia Univ.
    • Columbia University and Center for Computational Quantum Physics, Flatiron Institute

  • Angel Rubio

    • Max Plank Institute for the Structure and Dynamics of Matter; Center for Computational Quantum Physics Flatiron Institute
    • Max Planck Institute for the Structure and Dynamics of Matter
    • Theory, Max Planck Institute for the Structure and Dynamics of Matter
    • Max Planck Inst Structure & Dynamics of Matter
    • Physics, Max Planck Institute
    • Max Planck Institute for Structure and Dynamics of Matter and Center for Free-Electron Laser Science
    • Max Planck Institute for the Structure and Dynamics of Matter, Center for Free Electron Laser Science, 22761 Hamburg, Germany
    • Max Planck Institute for the Structure and Dynamics of Matter and Center Free-Electron Laser Science, Hamburg, Germany
    • Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany
    • MPSD Hamburg
    • Max Planck Institute
    • Max Planck Inst Structure & Dynamics of Matter; Center for Computational Quantum Physics Flatiron Institute, Simons Foundation NY, USA
    • Theory, Max Planck Inst Structure & Dynamics of Matter

  • Eugene Demler

    • Harvard University
    • Department of Physics, Harvard University

  • Nuh Gedik

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology

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