APS Logo

Tunneling Mechanism in Ultimate Thin Vertical Au/MoS2/Au Tunnel Junction

ORAL

Abstract

This study illustrates the nature of electronic transport and its transition from direct tunneling to Fowler Nordheim tunneling between a metal electrode and MoS2 channel interface in a vertical tunnel device configuration. We developed a fabricating procedure to prepare vertical tunnel junction based on 2D transition metal dichalcogenides sandwiched between two ultra-flat Au substrates. We prepared ultra-flat gold electrodes using template stripping. The devices were prepared by dry transfer technique. We studied many devices with varying thickness from monolayer to few layers MoS2. We studied the transition between Fowler-Nordheim tunneling and direct tunneling signatures at different temperature ranging from 77K to room temperature allowing us to extract the Schottky barrier height precisely. We found that the Schottky barrier height depends on the temperature and layer numbers.

–

Presenters

  • Shirin Jamali

    Department of Physics and Astronomy, San Francisco State University, Physics and Astronomy, San Francisco State University, Department of Physics and Astronomy, San Francisco State University, San Francisco, California 94132, United States

Authors

  • Shirin Jamali

    Department of Physics and Astronomy, San Francisco State University, Physics and Astronomy, San Francisco State University, Department of Physics and Astronomy, San Francisco State University, San Francisco, California 94132, United States

  • Viviane Z. Costa

    Department of Physics and Astronomy, San Francisco State University, Physics and Astronomy, San Francisco State University, San Francisco State University, Department of Physics and Astronomy, San Francisco State University, San Francisco, California 94132, United States

  • Garrett Benson

    Department of Physics and Astronomy, San Francisco State University, San Francisco, California 94132, United States

  • Andrew Ichimura

    Department of Chemistry and Biochemistry, San Francisco State University, Chemistry and Biochemistry, San Francisco State University, Department of Chemistry and Biochemistry, San Francisco State University, San Francisco, California 94132, United States

  • Akm Newaz

    Department of Physics and Astronomy, San Francisco State University, Physics and Astronomy, San Francisco State University, San Francisco State University, Department of Physics and Astronomy, San Francisco State University, San Francisco, California 94132, United States