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Questions concerning crystallography, the science of determining the arrangement of atoms in crystalline solids.

5 votes
2 answers
286 views

How does one make sure that the [hkl] direction in ab-inito calculations is the same as in e...

I am currently looking at isotropic properties and let's say I want to determine my property in the [100] direction. Now, I basically want that my [100] direction be the same as the [100] direction in …
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  • 659
7 votes
1 answer
564 views

How does one decide the directions in which they will calculate effective mass?

I have been working on trying to calculate the effective mass in different directions by fitting a parabola to the VBM and CBM and using the fitted parameters to calculate $\frac{d^2E}{dk^2}$. And th …
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  • 659
3 votes
0 answers
69 views

Tilting Octahedra of Perovskite structures in structure file [closed]

Perovskite materials form as a combination of $\ce{BX_6}$ octahdera along with A cation. Some perovskites display tilted octahedras. I am currently trying to run calculations for different tilted vers …
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  • 659