Hi, I’m an amateur in solid-state physics. Recently I want to using GTPack to **draw a Brillouin Zone of honeycomb lattice** using **GTVoronoiCell** command. But I** don’t know how to set the parameter “cluster” and “shell number”**. Could some one give me an example to this? Thanks a lot!

Thanks for your question. The definition of the basis, the reciprocal basis, and the k-path is closely connected. Measuring the basis in *a, *the reciprocal basis is given in units of *2π/a. *The k-path provided by GTBZPath is also given in units of *2π/a*. Hence, to obtain the correct plot, we rescale the reciprocal basis accordingly. Also, I recommend using a numerical evaluation, which can be achieved by writing at least one input as a real number, e.g., “2.” instead of “2”. I provide an example below.

Execllent!! Thanks for your considering !