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arxiv: 0803.2857 · v1 · submitted 2008-03-19 · ❄️ cond-mat.str-el · cond-mat.mes-hall

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

classification ❄️ cond-mat.str-el cond-mat.mes-hall
keywords magneticsiteantiferromagnetismfermionslatticelatticesone-dimensionalaccount
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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.

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