Where i can find complete data for material elastic constants??
I need elastic constants, piezoelectric coefficients & permittivity for different semiconductor alloy?
Someone could kindly help...
1stly, if your crystal is zinc-blende:
the inversion symmetry will give rise to the zero shear strain while shear strain can never vanish when lack of inversion symmetry. In general, the shear strain in zinc-blende is small...
2ndly, if your crystal is wurtzite:
the shear strain can never...
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.
Exactly, strain is a pointwise scalar, the best way to plot them along a particular direction and then plot them one by one, separately, as follows:
plot(x,exx)
hold on
plot(x,eyy)
plot(x,exy)
...
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??
Thx a lot for ur patience & excellent background...
Actually, what i want to do is using my numerical model to simulate the experiment. That's why i need to know the exact length, height, etc.
So, i should use "5 nm" in above example to simulate the QD. Right?
Then, let's say a particular example in a paper - "5nm-height 2.5ML InAs quantum dots", what does it mean?
Should the height of QD be equal to "2*lattice constant of InAs (~6Å)" ? Isn't it ??
Always be used in experiments... but when it appears in literature, most authors never tell the exact value of 1 ML (monolayer).
So, what is the value, generally??
I'm working on some calculations on Al0.35Ga0.65As & In0.65Al0.45As.
Someone can tell me where i can find the elastic/piezoelectric/dielectric constants for these rare alloys?? A database for them exist for us to search??
Thx...