Band splitting and relative spin alignment in bilayer systems
Max Planck Institute for Physics of Complex Systems
Nothnotzer Str., 38, D-01187 Dresden, Germany
2 Joint Institute of Chemical Physics, RAS Kosygin str., 6, 117334, Moscow, Russia
Accepted: 1 November 2001
The influence of the spin alignment on the band splitting in bilayer correlated systems is studied. In the normal state the splitting occurs to be large or small depending on the relative orientation of staggered spins of the layers. The change of the ground-state spin configuration with doping is shown. The behaviour of the bilayer splitting in is consistent with the same alignment of staggered spins in the normal state but does not reject a possible transformation of spin configuration in the course of the superconducting transition.
PACS: 71.10.Fd – Lattice fermion models (Hubbard model, etc.) / 71.27.+a – Strongly correlated electron systems; heavy fermions / 71.10.Hf – Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems
© EDP Sciences, 2002