Big data spectromicroscopy: achieving new observables in ARPES from 2D surface maps

ORAL

Abstract

Topological insulators (TIs) are bulk semiconductors that manifest spin-helical conducting surface states due to the topological bulk-boundary correspondence principle. Control and deeper understanding of the surface environment is thus of vital importance for long-term technological goals. In this talk, I will describe a data acquisition and analysis framework termed sparse big data (SBD) spectroscopy, in which one rapidly maps a sample surface to resolve the variation of electronic structure as a function of local environment. Leveraging the large data set enables one to realize the analog of a multi-dimensional doping series. I will present examples demonstrating that the fine ‘control’ this entails can be used to unlock new experimental observables such as a hybridization-like interplay between the surface and bulk electronic states in a TI. I will also touch on likely avenues for future development involving convolutional neural networks and new data visualization strategies.

*This research used resources of the Advanced Light Source, a DOE Office of Science User Facility. Work at NYU was supported by the MRSEC Program of the NSF. Synthesis and analysis instrumentation at NYU is supported by the NSF and by the Gordon and Betty Moore Foundation’s EPiQS Initiative.

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Presenters

  • Erica Kotta

    • Department of Physics, New York University, New York, NY, USA
    • New York Univ NYU

Authors

  • Erica Kotta

    • Department of Physics, New York University, New York, NY, USA
    • New York Univ NYU

  • Lin Miao

    • Department of Physics, New York University, New York, NY, USA
    • Southeast University

  • Yishuai Xu

    • Department of Physics, New York University, New York, NY, USA
    • New York Univ NYU

  • Stanley A Breitweiser

    • Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA, USA
    • University of Pennsylvania

  • Chris Jozwiak

    • Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
    • Lawrence Berkeley National Laboratory
    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Advanced Light Source
    • Advanced Light Source, Lawrence Berkeley National Lab

  • Aaron Bostwick

    • Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Advanced Light Source
    • Advanced Light Source, Lawrence Berkeley National Lab

  • Eli Rotenberg

    • Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
    • Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Lab, Advanced Light Source
    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Advanced Light Source
    • Advanced Light Source, Lawrence Berkeley National Lab
    • LBNL

  • Wenhan Zhang

    • Rutgers Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, USA

  • Weida Wu

    • Rutgers Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, USA
    • Department of Physics and Astronomy, Rutgers, The State University of New Jersey
    • Rutgers University
    • Department of Physics and Astronomy, Rutgers University

  • Takehito Suzuki

    • Massachusetts Institute of Technology, Department of Physics, Cambridge, MA, USA
    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology

  • Joseph Checkelsky

    • Massachusetts Institute of Technology, Department of Physics, Cambridge, MA, USA
    • Massachusetts Institute of Technology MIT
    • Department of Physics, Massachusetts Institute of Technology
    • Massachusetts Institute of Technology
    • Physics, Massachusetts Institute of Technology

  • Lewis Wray

    • Department of Physics, New York University, New York, NY, USA
    • New York Univ NYU