Two dimensional SrTiO<sub>3</sub> membranes

ORAL

Abstract

Perovskite SrTiO3 (STO) exhibits a wide range of exciting phenomena in addition to being a common substrate in epitaxial growth of various oxides like LaAlO3, BaTiO3, etc. There is a growing interest in studying new physical phenomena happens in the oxide materials in the two dimensional limit. We developed an etching method to fabricate free-standing STO membranes. The membranes are typically 5-8 um wide and 10-20 um long with thickness ranging from two to several tens of nanometers. We use Micro-Raman spectroscopy to investigate the STO membranes’ vibrational spectra and compare with that of the bulk STO. To exploit the high dielectric constant of STO, we design and fabricate electronic devices combining STO membranes with other two dimensional materials such as graphene and h-BN.

*This research was partially supported by the National Science Foundation through the Center for Dynamics and Control of Materials: an NSF MRSEC under Cooperative Agreement No. DMR-1720595 and by the Air Force Office of Scientific Research under Grant FA9550-18-1-0053.

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Presenters

  • Wei Guo

    • University of Texas at Austin

Authors

  • Wei Guo

    • University of Texas at Austin

  • Agham Posadas

    • University of Texas at Austin
    • Physics, UT Austin

  • Alexander Demkov

    • University of Texas at Austin
    • Department of Physics, University of Texas at Austin
    • Physics, UT Austin

  • Anupam Roy

    • University of Texas at Austin

  • Amritesh Rai

    • University of Texas at Austin

  • omar Mohammed

    • University of Texas at Austin

  • Sanjay Banerjee

    • University of Texas at Austin

  • Kevin Olsson

    • University of Texas at Austin

  • Xiaoqin (Elaine) Li

    • University of Texas at Austin
    • University of Texas-Austin
    • The University of Texas at Austin
    • Department of Physics and Center for Complex Quantum Systems, Univ of Texas, Austin
    • Department of Physics, University of Texas at Austin, TX 78712, United States
    • Univ of Texas, Austin
    • Department of Physics, The University of Texas at Austin
    • Department of Physics, The University of Texas at Austin, USA