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Related Concept Videos

Schottky Barrier Diode01:27

Schottky Barrier Diode

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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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Characteristics of Life01:23

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Biology is a natural science that studies life and living organisms, including their structure, function, development, interactions, evolution, distribution, and taxonomy. The field's scope is extensive and divided into several specialized disciplines, such as anatomy, physiology, ethology, genetics, and many more. All living things share a few key traits, including cellular organization, heritable genetic material and the ability to adapt/evolve, metabolism to regulate energy needs, the...
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Protein-protein Interfaces

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When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
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Contact-dependent signaling, as the name suggests, requires that communicating cells be in direct contact with each other. This is achieved either through receptor-ligand interactions or by specialized cytoplasmic channels that allow the flow of small molecules between cells. In animal cells, channels called gap junctions facilitate contact-dependent signaling in certain tissues, whereas, plasmodesmata perform a similar function in plants.
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When a force is applied parallel to the top surface of a solid, it resists the applied force due to the internal frictional forces between the layers of the solid known as shearing resistance. However, when the force is removed, the shearing forces restore the original shape of the solid. Other deformation forces also cause temporary changes in shape if the forces are not beyond a threshold magnitude. Solids tend to retain their shape, making the study of their rest and motion easier. Beyond...
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Analysis of Contact Interfaces for Single GaN Nanowire Devices
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Schottky Barrier Height Modulation Using Interface Characteristics of MoS2 Interlayer for Contact Structure.

Seung-Hwan Kim, Kyu Hyun Han, Gwang-Sik Kim

  • 1Department of Materials Science and Engineering , The University of Texas at Dallas , Richardson , Texas 75080 , United States.

ACS Applied Materials & Interfaces
|January 22, 2019
PubMed
Summary

Engineers can now use various metals to create low Schottky barrier height (SBH) contacts in nanoelectronics. A new metal/molybdenum disulfide/semiconductor structure effectively lowers SBH, improving device performance.

Keywords:
Fermi-level pinningIII−V semiconductorSchottky barrier heightgermaniummetal-induced gap statemolybdenum disulfidesource/drain contact

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Electrical Engineering

Background:

  • Schottky barrier height (SBH) engineering is crucial for high-performance nanoelectronic and optoelectronic devices.
  • Current methods for lowering SBH have limited the choice of contact metals, requiring work functions near the semiconductor's conduction band edge (CBE).

Purpose of the Study:

  • To introduce a novel metal/transition metal dichalcogenide/semiconductor structure for effective SBH reduction.
  • To demonstrate a wider range of contact metal choices for improved nanoelectronic and optoelectronic applications.

Main Methods:

  • Utilizing a perpendicularly integrated molybdenum disulfide (MoS2) interlayer within a metal/interlayer/semiconductor (MIS) structure.
  • Leveraging the MoS2 interlayer to alleviate Fermi-level (FL) pinning at the MoS2/semiconductor interface and induce FL pinning at the metal/MoS2 interface.

Main Results:

  • Achieved significant SBH reductions from 0.48 to 0.12 eV for GaAs and 0.56 to 0.10 eV for Ge.
  • Demonstrated the successful application of diverse contact metals, overcoming previous limitations.

Conclusions:

  • The proposed metal/MoS2/semiconductor structure offers a versatile approach to SBH engineering.
  • This technique overcomes critical contact challenges in nanoelectronics and optoelectronics, enabling wider material selection.