TY - JOUR
T1 - Exact results for itinerant ferromagnetism in multiorbital systems on square and cubic lattices
AU - Li, Yi
AU - Lieb, Elliott H.
AU - Wu, Congjun
PY - 2014/5/27
Y1 - 2014/5/27
N2 - We study itinerant ferromagnetism in multiorbital Hubbard models in certain two-dimensional square and three-dimensional cubic lattices. In the strong coupling limit where doubly occupied orbitals are not allowed, we prove that the fully spin-polarized states are the unique ground states, apart from the trivial spin degeneracies, for a large region of filling factors. Possible applications to p-orbital bands with ultracold fermions in optical lattices, and electronic 3d-orbital bands in transition-metal oxides, are discussed.
AB - We study itinerant ferromagnetism in multiorbital Hubbard models in certain two-dimensional square and three-dimensional cubic lattices. In the strong coupling limit where doubly occupied orbitals are not allowed, we prove that the fully spin-polarized states are the unique ground states, apart from the trivial spin degeneracies, for a large region of filling factors. Possible applications to p-orbital bands with ultracold fermions in optical lattices, and electronic 3d-orbital bands in transition-metal oxides, are discussed.
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U2 - 10.1103/PhysRevLett.112.217201
DO - 10.1103/PhysRevLett.112.217201
M3 - Article
AN - SCOPUS:84901675813
SN - 0031-9007
VL - 112
JO - Physical review letters
JF - Physical review letters
IS - 21
M1 - 217201
ER -