Yambo Community Forum

Dear developers and users,
here a very simple question but I would like just to be sure.
concerning the iku units of Yambo. To recover the k vector in the momentum space, do we just need to divide by the lattice parameters given in the file r_setup?

(kx, ky, kz) [momentum space] = ( iku_x/a1 , iku_y/a2 , iku_z/a3 )

Thanks.

Alejandro.

Dear Alejandro,
the relation between cartesian coordinates [k(cc)] and internal k units [k(iku)] is:
kx(cc)=kx(iku)* 6.28... / alat_x

Here 6.28... = 2.*pi , while you find alat_x in the r_setup file in the line
... with scaling factors [a.u.]: alat_x alat_y alat_z

Best,
Davide