Electronic band structure, Fermi surface and effect of spin-orbit   coupling for tetragonal low-temperature superconductor Bi2Pd from first   principles
  We have examined theoretically the electronic band structure and Fermi surface of tetragonal low-temperature superconductor Bi2Pd. Our main results are that (i) the Pd 4d and Bi 6p states determine the main peculiarities of the multiple-sheets FS topology, thus for this material the complicated superconducting gap structure with different energy gaps on different FS sheets should be assumed; (ii) the effect of the spin-orbit coupling is of minor importance for the distributions of the near-Fermi electronic states; and (iii) this phase adopts 3D-like type owing to the directional bonds between the adjacent atomic sheets. 
I.R. Shein and A.L. Ivanovskii
cond-mat.supr-con cond-mat.mtrl-sci