Proposed realization of itinerant ferromagnetism in optical lattices

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.053618· OSTI ID:21528698

Shizhong, Zhang ^[1]; Hsianghsuan, Hung; Congjun, Wu ^[2]

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1. Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)
2. Department of Physics, University of California, San Diego, California 92093 (United States)

We propose a scheme to realize the itinerant ferromagnetism of two-component cold fermionic atoms in the p-orbital bands in optical lattices. The band flatness in the two-dimensional honeycomb lattice dramatically amplifies the interaction effect, driving the ferromagnetic transition even with a relatively weak repulsive interaction. This scheme has the advantage that the stability of the system can be maintained without causing decay to the molecular state as one approaches the Feshbach resonance from the side with the positive scattering length. Experimental signatures and detections are also discussed.

• OSTI ID: 21528698
• Journal Information: Physical Review. A, Vol. 82, Issue 5; Other Information: DOI: 10.1103/PhysRevA.82.053618; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTAL LATTICES
DECAY
DETECTION
FERMIONS
FERROMAGNETISM
INTERACTIONS
RESONANCE
SCATTERING LENGTHS
STABILITY
TWO-DIMENSIONAL CALCULATIONS
CRYSTAL STRUCTURE
DIMENSIONS
LENGTH
MAGNETISM