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Probing anisotropic transport in atomically thin ReS<sub>2</sub> via ferroelectric domain controlled nanowire patterning

ORAL

Abstract

The layered van der Waals material ReS2 exhibits highly anisotropic band structure in the 1T' phase. In this work, we probe the effect of the band anisotropy on the transport properties of single- and few-layer ReS2 via ferroelectric field effect combined with ferroelectric domain patterning. We fabricated mechanically exfoliated ReS2 flakes into two-point transistor devices sandwiched between a SiO2/Si back gate and a ferroelectric polymer P(VDF-TrFE) thin film top layer. The polarization of P(VDF-TrFE) was then controlled at the nanoscale using conductive atomic force microscopy. By uniformly polarizing the ferroelectric top layer into the up (Pup) and down (Pdown) directions, we induced up to 105 current switching in a bilayer ReS2 channel at 300 K. We then polarized the entire channel into the insulating state, and created a line-shape domain across the channel, leading to a conductive nanowire. By creating nanowires at different orientations, we mapped out the angular dependence of ReS2 conductivity, which reveals more than one order of magnitude difference between the directions along and perpendicular to the b-axis. We compared the results with DFT calculated band structure of ReS2.

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Presenters

  • Dawei Li

    Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, University of Nebraska - Lincoln, Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln

Authors

  • Dawei Li

    Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, University of Nebraska - Lincoln, Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln

  • Shuo Suo

    University of Nebraska - Lincoln, Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln

  • Zhiyong Xiao

    Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln

  • Jingfeng Song

    Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln

  • Ding-Fu Shao

    University of Nebraska - Lincoln, Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln

  • Evgeny Y Tsymbal

    University of Nebraska - Lincoln, Department of Physics and Astronomy, Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln

  • Stephen P Ducharme

    University of Nebraska - Lincoln, Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln

  • Xia Hong

    Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, University of Nebraska - Lincoln, Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln