Competing orders in one dimensional spin 3/2 fermionic systems

Details Competing orders in one dimensional spin 3/2 fermionic systems Competing orders in one dimensional spin 3/2 fermionic systems

2004-09-09

arxiv.org/abs/cond-mat/0409247v6

Phys. Rev. Lett. 95, 266404 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures, revised version

Scientific paper

10.1103/PhysRevLett.95.266404

Novel competing orders are found in spin 3/2 cold atomic systems in one-dimensional optical traps and lattices. In particular, the quartetting phase, a four-fermion counterpart of Cooper pairing, exists in a large portion of the phase diagram. The transition between the quartetting and singlet Cooper pairing phases is controlled by an Ising symmetry breaking effect in one of the spin channels. The singlet Cooper pairing phase also survives in the purely repulsive interaction regime. In addition, various charge and bond ordered phases are identified at commensurate fillings in lattice systems.

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