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This study showcases Indium Selenide (In2Se3) thin films for advanced in-memory computing. These 2D ferroelectric field-effect transistors (FeFETs) offer high performance and potential for neuromorphic applications.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Electrical Engineering

Background:

  • Emerging 2D materials are crucial for overcoming the von Neumann bottleneck in computing.
  • Indium Selenide (In2Se3) exhibits unique properties, including room-temperature ferroelectricity and high carrier mobility.
  • Chemical Vapor Deposition (CVD) enables the synthesis of large-area 2D materials for device fabrication.

Purpose of the Study:

  • To investigate the performance of Indium Selenide (In2Se3) thin film ferroelectric field-effect transistor (FeFET) arrays.
  • To evaluate the potential of these 2D FeFETs for in-memory and neuromorphic computing applications.
  • To demonstrate the stability and non-volatile characteristics of the In2Se3 FeFET array.

Main Methods:

  • Fabrication of In2Se3 thin film FeFET arrays using Chemical Vapor Deposition (CVD).
  • Characterization of device performance, including field-effect mobility (µFE) and on-off ratio.
  • Testing the stability and non-volatile memory characteristics of the FeFET array.
  • Application of the In2Se3 FeFET array in machine learning tasks for neuromorphic computing.

Main Results:

  • The In2Se3 FeFET array achieved a high field-effect mobility (µFE) of 151.7 cm² V⁻¹ s⁻¹.
  • An impressive on-off ratio of up to 10⁶ was recorded.
  • Stable, non-volatile characteristics were observed, with a resistance state window > 10² maintained for over 1800 seconds.
  • Recognition accuracy exceeding 90% was consistently achieved in machine learning tasks.

Conclusions:

  • In2Se3 thin film FeFET arrays are a promising solution for next-generation in-memory computing.
  • The demonstrated high performance and stability highlight their potential for neuromorphic computing.
  • CVD synthesis facilitates the development of large-area 2D FeFET arrays for practical applications.