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arXiv · 1701.07000

Strain engineering of Schottky barriers in single- and few-layer MoS2 vertical devices

Jorge Quereda·Juan José Palacios·Nicolás Agräit·Andres Castellanos-Gomez·Gabino Rubio-Bollinger
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Abstract

We study the effect of local strain in the electronic transport properties of vertical metal-atomically thin MoS2-metal structures. We use a conductive atomic force microscope tip to apply different load forces to monolayer and few-layer MoS2 crystals deposited onto a conductive indium tin oxide (ITO) substrate while measuring simultaneously the I-V characteristics of the vertical tip/MoS2/ITO structures. The structures show rectifying I-V characteristics, with rectification ratios strongly dependent on the applied load. To understand these results, we compare the experimental I-Vs with a double Schottky barrier model, which is in good agreement with our experimental results and allows us to extract quantitative information about the electronic properties of the tip/MoS2/ITO structures and their dependence on the applied load. Finally, we test the stability of the studied structures using them as mechanically tunable current rectifiers.

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Jorge Quereda, Juan José Palacios, Nicolás Agräit, Andres Castellanos-Gomez, Gabino Rubio-Bollinger. 2017-01-24. Strain engineering of Schottky barriers in single- and few-layer MoS2 vertical devices. https://doi.org/10.1088/2053-1583%2Faa5920

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