| Issue |
Europhys. Lett.
Volume 57, Number 2, January 2002
|
|
|---|---|---|
| Page(s) | 226 - 232 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00565-4 | |
| Published online | 01 September 2002 | |
Band splitting and relative spin alignment in bilayer systems
1
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
Received:
16
July
2001
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
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