Shot-Noise Measurements of Waveguides with Attractive Electron-Electron Interactions

ORAL

Abstract


Mesoscopic devices created at oxide interfaces, such as the LaAlO3/SrTiO3 heterostructure [1], exhibit a wide range of exotic behavior that is linked to a strong electron-electron interaction. Electron pairing without superconductivity [2] involves transport of charge-2e carriers and higher-order “Pascal” phases with charge ne (n>2), have been identified in quantum transport measurements. One way to gain further insight to these phases would be to verify the existence of quantized charge by measuring shot noise. Here we describe experimental efforts to reveal shot-noise characteristics in electron waveguide devices whose electronic phases that can be tuned between paired and unpaired state via tuning of magnetic field and chemical potential. These shot noise measurements have the potential to confirm the charge of these exotic electron liquid phases and provide insight into their phase diagrams.

[1] Y.-Y. Pai, A. Tylan-Tyler, P. Irvin, and J. Levy, Rep Prog Phys 81, 036503 (2018).
[2] G. Cheng et al., Nature 521, 196 (2015).

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Presenters

  • Muqing Yu

    University of Pittsburgh

Authors

  • Muqing Yu

    University of Pittsburgh

  • Yun-Yi Pai

    Department of Physics and Astronomy, University of Pittsburgh, University of Pittsburgh

  • Leena Aggarwal

    University of Pittsburgh

  • Hyungwoo Lee

    Department of Materials Science and Engineering, University of Wisconsin–Madison, Department of Materials Science and Engineering, University of Wisconsin-Madison, University of Wisconsin-Madison, Department of Material Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, Univ of Wisconsin-Madison, University of Wisconsin–Madison

  • Jungwoo Lee

    Department of Materials Science and Engineering, University of Wisconsin-Madison, University of Wisconsin-Madison, Department of Materials Science and Engineering, University of Wisconsin–Madison, Department of Material Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, Univ of Wisconsin-Madison

  • Chang-Beom Eom

    Department of Materials Science and Engineering, University of Wisconsin–Madison, Department of Materials Science and Engineering, University of Wisconsin-Madison, University of Wisconsin-Madison, Department of Material Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, Univ of Wisconsin-Madison, University of Wisconsin–Madison

  • Patrick Irvin

    Department of Physics and Astronomy, University of Pittsburgh, Department of Physics, University of Pittsburgh, University of Pittsburgh, Department of Physics & Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh

  • Jeremy Levy

    Department of Physics and Astronomy, University of Pittsburgh, Department of Physics, University of Pittsburgh, University of Pittsburgh, Department of Physics & Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh