Gate-tunable atomically thin lateral MoS<inf>2</inf> Schottky junction patterned by electron beam

Y. Katagiri, T. Nakamura, A. Ishii, C. Ohata, M. Hasegawa, S. Katsumoto, T. Cusati, A. Fortunelli, G. Iannaccone, G. Fiori, S. Roche, J. Haruyama

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    55 Citations (Scopus)

    Abstract

    © 2016 American Chemical Society. Among atomically thin two-dimensional (2D) materials, molybdenum disulfide (MoS2) is attracting considerable attention because of its direct bandgap in the 2H-semiconducting phase. On the other hand, a 1T-metallic phase has been revealed, bringing complementary application. Recently, thanks to top-down fabrication using electron beam (EB) irradiation techniques, in-plane 1T-metal/2H-semiconductor lateral (Schottky) MoS2 junctions were demonstrated, opening a path toward the co-integration of active and passive two-dimensional devices. Here, we report the first transport measurements evidencing the formation of a MoS2 Schottky barrier (SB) junction with barrier height of 0.13-0.18 eV created at the interface between EB-irradiated (1T)/nonirradiated (2H) regions. Our experimental findings, supported by state-of-the-art simulation, reveal unique device fingerprint of SB-based field-effect transistors made from atom-thin 1T layers.
    Original languageEnglish
    Pages (from-to)3788-3794
    JournalNano Letters
    Volume16
    Issue number6
    DOIs
    Publication statusPublished - 8 Jun 2016

    Keywords

    • 1T phase
    • Atomically thin layers
    • electron-beam irradiation
    • Schottky junction
    • semiconductor-metal transition

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