Magnetic Phases of Fermionic Atoms Confined in 1-D Optical Superlattice
Jereson Silva-Valencia, R. Franco, Marcos Sergio Figueira
We study the ground state of alkaline-earth fermionic atoms confined in a one-dimensional optical superlattice, when the number of delocalized atoms is one-fourth the number of system sites. We used the density matrix renormalization group method and found a paramagnetic to ferromagnetic quantum phase transition for any value of the potential strength. The local critical antiferromagnetic coupling decreases as the superlattice potential increases.
IEEE Transactions on Magnetics•Jul 24, 2013•1 citation