Dear Sir,

I came across a very recent paper by Professor Claudio A. performing DFPT using a non-diagonal supercell method. The section where the fractional k-points are mapped seems very interesting and appealing. I thus took some time to understand first Professor Monserrat's earlier work on non-diagonal supercell. Using the corresponding .f90 program I was able to get the fractional IBZ (I hope I did correct).

Since there is no tutorial on this, I was wondering how to map now this supercell to get the DFPT results. I would greatly appreciate if you make me understand this process flow.

Thanks and regards,

Sitangshu