Light-induced long-lived metallic phase in an excitonic insulator studied by angle-resolved photoemission

ORAL

Abstract

Non-equilibrium states in materials are usually studied in the ultrafast time domain. However, a recent report on the excitonic insulator Ta2NiSe5 used light pulses to induce a low-resistance state that can last for several hours or days. To date, little is known on the electronic structure of this novel metallic state. We investigate here the effect of light pulses on the electronic bands of Ta2NiSe5 by using Angle-Resolved Photoemission Spectroscopy (ARPES) using synchrotron light as a probe and infrared light pulses to trigger the metastable state, and report on our findings.

*Department of Energy; Moore Foundation

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Presenters

  • Akshara Aditya

    • UC Berkeley

Authors

  • Akshara Aditya

    • UC Berkeley

  • Cheng Hu

    • Berkeley National Lab
    • Lawrence Berkeley National Lab

  • Luca Moreschini

    • Lawrence Berkeley National Lab

  • Christopher Jozwiak

    • Lawrence Berkeley National Lab
    • Lawrence Berkeley National Laboratory
    • Berkeley National Lab
    • Advanced Light Source
    • The Advanced Light Source, Lawrence Berkeley National Laboratory
    • Advanced Light Source, Lawrence Berkeley National Laboratory

  • Aaron Bostwick

    • Lawrence Berkeley National Lab
    • Lawrence Berkeley National Laboratory
    • Berkeley National Lab
    • Advanced Light Source
    • The Advanced Light Source, Lawrence Berkeley National Laboratory
    • Advanced Light Source, Lawrence Berkeley National Laboratory

  • Alessandra Lanzara

    • University of California, Berkeley