Structure diagnostics of heterostructures and multi-layered systems by X-ray multiple diffraction.

Area of Science:

• Materials Science
• Solid State Physics
• Crystallography

Background:

• Multi-layered heterostructures are crucial in modern electronics and optoelectronics.
• Accurate characterization of lattice parameters and strain is essential for device performance.
• Existing X-ray diffraction methods may lack the precision for complex layered systems.

Purpose of the Study:

• To present a modified calculation technique for multiple X-ray diffraction.
• To establish conditions for high-precision analysis of heterostructures using specific diffraction geometries.
• To enable accurate determination of lattice parameters and strain anisotropy in thin layers.

Main Methods:

• Modified calculation technique of multiple X-ray diffraction.
• Modeling of AlInSb heterostructures.
• Modeling of Zn(Mn)Se/GaAs(001) multi-layered systems.
• Specification of conditions for coincidental coplanar three-beam and noncoplanar four-beam X-ray diffraction.

Main Results:

• The modified technique allows for precise determination of lattice parameters.
• Strain anisotropy in multi-layered heterostructures can be accurately quantified.
• Conditions for specific coincidental X-ray diffraction events were identified.

Conclusions:

• The developed X-ray diffraction method offers high precision for characterizing multi-layered heterostructures.
• This technique is valuable for understanding and optimizing materials for advanced applications.
• The study provides a pathway for improved material analysis in semiconductor research.