Total Ionizing Dose Effects on the 1<i>T</i>-TaS<sub>2</sub> Charge-Density-Wave Devices

ORAL

Abstract

The voltage controlled charge-density-wave (CDW) phase transition in quasi-2D 1T-TaS2 offers a possibility of using the switching behavior of these states for electronic applications. We have recently demonstrated a frequency tunable oscillator based on an integrated graphene–h-BN–TaS2 device that is capable of operating at room temperature [1]. In this work, we evaluate the total ionizing dose (TID) effect on 1T-TaS2 CDW devices by examining the current-voltage characteristics under X-ray irradiation at doses up to 1 Mrad(SiO2). We find that the threshold voltage, VTH, for the abrupt resistance change shifts by only ~2%, the resistance of the CDW states changes by less than ~2 % (low resistive state) and ~6.5 % (high resistive state), and the voltage oscillations function well after the full irradiation sequence [2]. We attributed the radiation hardness of these CDW devices to the high carrier concentration and absence of the gate dielectric in the structure. [1] G. Liu, et al., Nature Nanotechnology, 11, 845 (2016); [2] G. Liu, et al., IEEE Electron Device Letters (accepted, 2017) 10.1109/LED.2017.2763597.

*Acknowledgements: The work at UC Riverside was supported, in part, by NSF 2-DARE project EFRI-1433395, and UC-National Lab Collaborative Research and Training Program.

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Presenters

  • Guanxiong Liu

    • Electrical and computer Engineering, Univ of California - Riverside
    • Electrical and Computer Engineering, University of California, Riverside
    • University of California Riverside

Authors

  • Guanxiong Liu

    • Electrical and computer Engineering, Univ of California - Riverside
    • Electrical and Computer Engineering, University of California, Riverside
    • University of California Riverside

  • Enxia Zhang

    • Department of Electrical Engineering and Computer Science, Vanderbilt University

  • Chundong Liang

    • Department of Electrical Engineering and Computer Science, Vanderbilt University

  • Mathew Bloodgood

    • Chemsitry, University of Georgia
    • Department of Chemistry, University of Georgia

  • Tina Salguero

    • Chemsitry, University of Georgia
    • Department of Chemistry, University of Georgia

  • Alexander Balandin

    • Electrical and Computer Engineering , University of California
    • Electrical and Computer Engineering, University of California Riverside
    • Electrical and computer Engineering, Univ of California - Riverside
    • Department of Electrical and Computer Engineering/Materials Science and Engineering Program, University of California, Riverside
    • Department of Electrical and Computer Engineering, University of California, Riverside
    • Electrical and Computer Engineering, University of California, Riverside
    • University of California Riverside