Dear Siesta Users, I'm trying to understand the particular shape chosen for the contour integration for the density matrix in transiesta. I've already read the paper where the method is explained [Phys. Rev. B 65, 165401 (2002); pag 5, fig 2] but there the contour is only mentioned, not explained. I didn't find this contour in the literature I've found about contour integration in NEGF calculations.
I think that the answer must be very easy for the well documented user, so I ask you to share with me your knowledge or a reference where this particular shape for the contour integration is justified. Regards Juan Manuel
