Proposed realization of itinerant ferromagnetism in optical lattices

Shizhong Zhang, Hsiang-hsuan Hung, and Congjun Wu
Phys. Rev. A 82, 053618 – Published 17 November 2010

Abstract

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.

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  • Received 24 March 2010

DOI:https://doi.org/10.1103/PhysRevA.82.053618

©2010 American Physical Society

Authors & Affiliations

Shizhong Zhang1,2, Hsiang-hsuan Hung3, and Congjun Wu3

  • 1Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
  • 2Department of Physics, Ohio State University, Columbus, Ohio 43210, USA
  • 3Department of Physics, University of California, San Diego, California 92093, USA

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Issue

Vol. 82, Iss. 5 — November 2010

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