Magnetic phases of one-dimensional lattices with 2 to 4 fermions per site

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Nikkarila, J. -P.
Koskinen, M.
Reimann, S. M.
Manninen, M.
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Abstract
Description
We study the spectral and magnetic properties of one-dimensional lattices filled with 2 to 4 fermions (with spin 1/2) per lattice site. We use a generalized Hubbard model that takes account all interactions on a lattice site, and solve the many-particle problem by exact diagonalization. We find an intriguing magnetic phase diagram which includes ferromagnetism, spin-one Heisenberg antiferromagnetism, and orbital antiferromagnetism.
Comment: 8 pages, 6 figures
Keywords
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Mesoscale and Nanoscale Physics
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