Magnetic phases of one-dimensional lattices with 2 to 4 fermions per site
arXiv:0803.2857 · doi:10.1088/1367-2630/10/6/063013
Abstract
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.
8 pages, 6 figures
References in corpus (8)
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Tuning the scattering length with an optically induced Feshbach resonance
- Evidence for Superfluidity of Ultracold Fermions in an Optical Lattice
- Finite temperature phase diagram of a polarized Fermi gas in an optical lattice
- Luther-Emery Phase and Atomic-Density Waves in a Trapped Fermion Gas
- Fermion pairing with spin-density imbalance in an optical lattice
- Bipolar spin filter in a quantum dot molecule
- Electronic states in a magnetic quantum-dot molecule: phase transitions and spontaneous symmetry breaking