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

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

2008-03-19

arxiv.org/abs/0803.2857v1

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 6 figures

Scientific paper

10.1088/1367-2630/10/6/063013

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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