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Related Concept Videos

Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

898
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
898
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

549
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
549

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Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
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Atomistic observation of defect evolution during solidification in semiconductor InAs.

Changxin Han1, Bohua Zhang1, He Zheng2

  • 1School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. mao217@purdue.edu.

Nanoscale
|October 28, 2025
PubMed
Summary

Understanding defect formation in semiconductors like Indium Arsenide (InAs) is key for advanced devices. Nucleation energy control is vital for managing stacking faults and twinning during solidification.

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Semiconductor Research

Background:

  • Semiconductor structural and phase stability is critical for next-generation optoelectronic, thermoelectric, and quantum devices.
  • Atomistic observations are essential for understanding defect formation during semiconductor solidification.

Purpose of the Study:

  • To investigate the detailed evolution of stacking faults and twinning at the solid-liquid interface in Indium Arsenide (InAs).
  • To elucidate the mechanisms governing defect formation during semiconductor solidification.

Main Methods:

  • Conducted an in situ biasing experiment using a transmission electron microscope (TEM).
  • Performed atomistic observations at the solid-liquid interface of InAs.

Main Results:

  • Nucleation energy regulation was identified as a key factor in defect formation.
  • Observed thermally driven dislocation slip, stacking fault dynamics, and twin dissociation.
  • Revealed new pathways for defect evolution in advanced semiconductors.

Conclusions:

  • Controlling nucleation energy is crucial for managing defects in semiconductors.
  • Dislocation slip, stacking fault dynamics, and twin dissociation offer novel insights into semiconductor defect evolution.