Strain of material w. (111) orientation is asymmetric about center point? Why?

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SUMMARY

The discussion centers on the asymmetric strain distribution observed in InAs/GaAs(111) heterostructures compared to the symmetric strain in InAs/GaAs(001) structures. The calculations performed involved analyzing the strain component exx along the [100] direction. This asymmetry is attributed to the crystallographic orientation of the material, which influences the strain distribution characteristics. Understanding these differences is crucial for applications in semiconductor physics and materials science.

PREREQUISITES
  • Understanding of strain analysis in semiconductor materials
  • Familiarity with InAs/GaAs heterostructures
  • Knowledge of crystallographic orientations (e.g., (111) vs (001))
  • Experience with scalar strain calculations
NEXT STEPS
  • Research the impact of crystallographic orientation on strain distribution in semiconductor materials
  • Learn about advanced strain calculation techniques in heterostructures
  • Explore the properties and applications of InAs/GaAs heterostructures
  • Investigate the differences in mechanical properties between (111) and (001) oriented materials
USEFUL FOR

Materials scientists, semiconductor physicists, and engineers involved in the design and analysis of heterostructures will benefit from this discussion.

yzou_ua
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strain of material w. (111) orientation is asymmetric about center point? Why??

My calculation shows an asymmetric strain distribution in InAs/GaAs(111) heterostructure while it is symmetric in InAs/GaAs(001).

Someone could give explanation on it??
 
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How was your calculations done?
 


hiyok said:
How was your calculations done?

Since the strain is pointwise scalar, what i did is just to calculate one strain component along a particular direction, such as:
exx along x [100] direction, etc.
 

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