It's well known that VASP can print three orthogonal spin projections at each k point corresponding to each band in the file PROCAR controlled by the tags LORBIT and RWIGS. Is there a way
to obtain the same information from calculations done by QE?
If you do a noncollinear calculation, you can then get the spin projections along the x, y and z axes by utilizing the post-processing executable pp.x and choosing plot_num=7 and spin_component=1/2/3.
You can see other options in the input documentation.
the correct tool you search is bands.x - if you look at the
description of it, you will find the key word
lsigma(i), i=1,3 which does the job. Usually, bands.x is used for
paths along high symmetry lines in the BZ but you can also provide a
full MP grid if you want to plot the spin texture in the whole BZ. I
actually did this for a manuscript which is in the
still-to-be-finalized stage since ages...