Itinerant Ferromagnetism in an Atom Trap

Details Itinerant Ferromagnetism in an Atom Trap Itinerant Ferromagnetism in an Atom Trap

2008-05-25

arxiv.org/abs/0805.3693v2

Phys. Rev. B 79, 224403 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

Final Published version. References added

Scientific paper

10.1103/PhysRevB.79.224403

We propose an experiment to explore the magnetic phase transitions in interacting fermionic Hubbard systems, and describe how to obtain the ferromagnetic phase diagram of itinerant electron systems from these observations. In addition signatures of ferromagnetic correlations in the observed ground states are found: for large trap radii (trap radius $R_T > 4$, in units of coherence length $\xi$), ground states are topological in nature -- a "skyrmion" in 2D, and a "hedgehog" in 3D.

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