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Charge-density-wave devices using 1T-TaS2 exhibit exceptional radiation immunity against high-fluence proton bombardment. These robust all-metallic devices show no significant changes in performance, paving the way for advanced electronics in harsh environments.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Device Engineering

Background:

  • Conventional semiconductor devices and other 2D materials often suffer performance degradation when exposed to radiation.
  • Understanding the radiation tolerance of novel electronic materials is crucial for applications in extreme environments.

Purpose of the Study:

  • To investigate the radiation hardness of charge-density-wave (CDW) devices based on quasi-two-dimensional 1T-TaS2 channels.
  • To assess the impact of high-fluence proton irradiation on the electrical characteristics and noise spectra of these CDW devices.

Main Methods:

  • Fabrication of CDW devices with nanoscale-thickness 1T-TaS2 channels.
  • Exposure of devices to 1.8 MeV proton irradiation up to a fluence of 10^14 H+/cm^2.
  • Characterization of current-voltage (I-V) properties and low-frequency noise spectra before and after irradiation.

Main Results:

  • CDW devices demonstrated remarkable immunity to proton irradiation, with no significant changes in I-V characteristics observed.
  • Low-frequency noise spectra showed only negligible alterations post-irradiation.
  • The observed radiation tolerance is attributed to the quasi-2D electron transport, high carrier concentration, and 2D device design.

Conclusions:

  • Quasi-two-dimensional 1T-TaS2 charge-density-wave devices possess exceptional radiation hardness.
  • These all-metallic CDW devices are suitable for reliable operation in high-radiation environments such as space and particle accelerators.
  • The findings highlight the potential of CDW materials for next-generation radiation-hard electronics.