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Schottky Barrier Diode01:27

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Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
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A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
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A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
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The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
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Junctionless Negative-Differential-Resistance Device Using 2D Van-Der-Waals Layered Materials for Ternary Parallel

Taeran Lee1, Kil-Su Jung2,3, Seunghwan Seo1,4,5

  • 1Department of Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, South Korea.

Advanced Materials (Deerfield Beach, Fla.)
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Summary

This study introduces a novel negative-differential-resistance (NDR) device without junctions, simplifying fabrication for low-power multivalued logic computing. The new design enables ternary inverters and memory essential for advanced computing technologies.

Keywords:
2D vdW layered materialsbrain‐inspired parallel computingmultivalued logic computingnegative‐differential‐resistance device

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Area of Science:

  • Materials Science
  • Semiconductor Physics
  • Nanotechnology

Background:

  • Negative-differential-resistance (NDR) devices are crucial for low-energy computing, particularly multivalued logic.
  • Conventional NDR devices require complex fabrication, hindering integration into circuits and systems.

Purpose of the Study:

  • To present a novel NDR device design that simplifies fabrication and enhances integration potential.
  • To demonstrate the feasibility of using this new device for multivalued logic computing applications.

Main Methods:

  • Developed an NDR device incorporating a metal-insulator-semiconductor capacitor in the channel, eliminating the need for junctions.
  • Engineered partial potential barriers and wells to control carrier movement within specific voltage ranges.

Main Results:

  • Successfully achieved the negative-differential-resistance (NDR) phenomenon in the junctionless device.
  • Demonstrated the device's capability to function as a ternary inverter and ternary static-random-access-memory (SRAM).

Conclusions:

  • The junctionless NDR device offers a simplified and promising approach for fabricating components for multivalued logic computing.
  • This advancement paves the way for more efficient and integrated low-power computing systems.