Complete Strain Mapping of Nanosheets of Transition Metal Chalcogenides

ORAL

Abstract

Holding promise for future electronics because of their unique band structures, quasi-two-dimensional (quasi-2D) materials host electronic and mechanical properties sensitive to crystal strains in all three dimensions. Quantifying the crystal strain is a prerequisite to correlating it with the performance of the relevant device, and calls for fast characterization methods compatible with the potential devices and applications. Here we bridge this knowledge gap using fly-scan nano X-ray diffraction with strain sensitivity below 0.001 over sub 100 µm length scales. Coherent diffraction patterns were collected from a thin sheet of 1T-TaS2 using an area detector by scanning across and rotating the sample. Reconstructing from the resulting five-dimensional datasets yields information on the morphology of and the strain distribution around micron and sub-micron ‘bubbles’ which form spontaneously in the quasi-2D plane. Our studies thus open way to experimentally quantify local strains in these quasi-2D materials and will allow better understanding of strains in tuning material properties.

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Presenters

  • Yue Cao

    • Materials Science Division, Argonne National Laboratory
    • Argonne National Laboratory

Authors

  • Yue Cao

    • Materials Science Division, Argonne National Laboratory
    • Argonne National Laboratory

  • Tadesse Assefa

    • Brookhaven National Laboratory

  • Soham Banerjee

    • Brookhaven National Laboratory
    • Columbia University

  • Simon J L Billinge

    • Columbia University
    • Brookhaven National Laboratory

  • Jedrzej Wieteska

    • Columbia University
    • Physics, Columbia University
    • Department of Physics, Columbia University

  • Dennis Wang

    • Columbia University

  • Abhay Pasupathy

    • Columbia University
    • Physics, Columbia University
    • Department of Physics, Columbia University in the City of New York
    • Physics Department, Columbia University
    • Department of Physics, Columbia University

  • Xiao Tong

    • Brookhaven National Laboratory

  • Yu Liu

    • Institute of Solid State Physics, Chinese Academy of Sciences

  • Wenjian Lu

    • Institute of Solid State Physics, Chinese Academy of Sciences

  • Yuping Sun

    • Chinese Academy of Sciences
    • Institute of Solid State Physics, Chinese Academy of Sciences

  • Yan He

    • Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Institute of Applied Physics, Chinese Academy of Sciences

  • Xiaojing Huang

    • Department of Condensed Matter Physics and Materials Science, Brookhaven, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
    • Brookhaven National Laboratory

  • Hanfei Yan

    • Department of Condensed Matter Physics and Materials Science, Brookhaven, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
    • Brookhaven National Laboratory

  • Yong S. Chu

    • Department of Condensed Matter Physics and Materials Science, Brookhaven, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
    • Brookhaven National Laboratory

  • Ian Keith Robinson

    • BNL
    • Brookhaven National Laboratory