Atomistic observation of defect evolution during solidification in semiconductor InAs

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.