TY - JOUR A1 - Seibold, Götz A1 - Sigmund, Ernst A1 - Hizhnyakov, Vladimir T1 - Unrestricted slave-boson mean-field approximation for the two-dimensional Hubbard model T2 - Physical review Y1 - 2011 UR - https://opus4.kobv.de/opus4-UBICO/frontdoor/index/index/docId/5380 SN - 0556-2805 VL - 57 IS - 12 SP - 6937 EP - 6942 ER -