Messages

1

Scripts, Tutorials and Applications / Re: effective mass direction

« on: December 3, 2015, 19:04 »

Hi,

In the provided, mathematical relationship:

[hkl]*M*[hkl]^T.

Is the [hkl] vector in defined in Cartesian or fractional coordinates?

Thanks,

2

Scripts, Tutorials and Applications / effective mass direction

« on: December 3, 2015, 03:49 »

How are the projected effective masses along a particular direction related with the effective mass tensor?

I noted that the "direction_fracational" is a three-dimensional vector, e.g. [1, 0, 1] .  The output vector is also a three-dimensional vector, e.g., [X,0,0], where "X" is the value of the effective mass along a particular direction as specified in the "direction_fractional".

My question is what is the mathematical expression that connects the "direction_fractional" vector, the effective mass tensor and the output vector?

Thanks,
-rs1