Magnetism of Cold Fermionic Atoms on p-Band of an Optical Lattice

Abstract

We carry out \textit{ab initio} study of ground state phase diagram of spin-1/2 cold fermionic atoms within two-fold degenerate $p$-band of an anisotropic optical lattice. Using the Gutzwiller variational approach, we show that a robust ferromagnetic phase exists for a vast range of band fillings and interacting strengths. The ground state crosses over from spin density wave state to spin-1 Neel state at half filling. Additional harmonic trap will induce spatial separation of varies phases. We also discuss several relevant observable consequences and detection methods. Experimental test of the results reported here may shed some light on the long-standing issue of itinerant ferromagnetism.

5 pages, 4 figures

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Cited by in corpus (14)

• Physics of higher orbital bands in optical lattices: a review
• Proposed realization of itinerant ferromagnetism in optical lattices
• Exact Results on Itinerant Ferromagnetism in Multi-orbital Systems on Square and Cubic Lattices
• Ferromagnetism of cold fermions loaded into a decorated square lattice
• Quantum states of p-band bosons in optical lattices
• How to estimate the differential acceleration in a two-species atom interferometer to test the equivalence principle
• Approximate solution of variational wave functions for strongly correlated systems: Description of bound excitons in metals and insulators
• Dispersive spectrum and orbital order of spinless p-band fermions in an optical lattice
• Phase-separated Ferromagnetism in Spin-imbalanced Fermi Atoms Loaded on an Optical Ladder: a DMRG study
• Sign problem free quantum Monte-Carlo study on thermodynamic properties and magnetic phase transitions in orbital-active itinerant ferromagnets
• Spin-orbital exchange of strongly interacting fermions on the $p$-band of a two-dimensional optical lattice
• P-band in a rotating optical lattice
• Loading of bosons in optical lattices into the p band
• Phase diagram of strongly attractive $p$-orbital fermions on optical lattices