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Itinerant Ferromagnetism in an Atom Trap

Berdnikov, Ilya and Coleman, P. and Simon, Steven H. (2009) Itinerant Ferromagnetism in an Atom Trap. Physical Review B, 79 (224403). pp. 1-5. ISSN 1098-0121

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Abstract

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 RT > 4, in units of coherence length ε), ground states are topological in nature — a “skyrmion” in 2D, and a “hedgehog” in 3D.

Item Type: Article
Additional Information: The authors would like to thank T.-L. Ho and T. Esslinger for fruitful discussions. Supported by NSF Grants No. DMR-0605935, DOE Grant No. DE-FE02- 00ER45790, and the Rutgers-Lucent Foundation.
Keywords: Itinerant Ferromagnetism; Atom Trap; phase transitions; Hubbard systems;
Subjects: Science & Engineering > Mathematical Physics
Item ID: 2696
Identification Number: DOI: 10.1103/PhysRevB.79.224403
Depositing User: Steven H. Simon
Date Deposited: 06 Sep 2011 15:36
Journal or Publication Title: Physical Review B
Publisher: American Physical Society
Refereed: Yes
URI:

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