<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>Hi everyone.</div><div>I calculated the eigenvalues and wavefunctions for different k point inside the first Brillouin Zone. My system is a Graphene Monolayer. Because of the complexity of the calculation I have to do with the eigenfunctions, I need to exploit the symmetry of the Brillouin Zone. </div><div>I calculated the band structure in k points connected one to another by symmetry operations, for instance the 6 K points of the 2D graphene lattice.</div><div>In fact I find out that the corresponding eigenvalues for each K point differ very slightly. I obtained also the eigenvectors using the pw_export utility of the package, but I wasn't able to find the connection between the eigenvectors. I noticed that the number of planewaves used for the k points linked by the symmetry connection is the
same, but the palnewaves used are different, of corse. I know that the code exploit the symmetries so my question is can anyone tell me what is the connection between the eigenfunction corresponding to k points connected by symmetry operations? If there is any, of corse.</div><div>Thank you.</div><div> </div><span><div>Michele Pisarra, PhD Student,</div><div>Dipartimento di Fisica, Università della Calabria</div><div>Via P. Bucci, Cubo 31 C VI piano, 87036, Rende (CS), Italy</div></span><div> </div></div></body></html>