Probing Nagaoka ferromagnetism in optical superlattices

ORAL

Abstract

In 1966, Nagaoka predicted that interaction-induced ferromagnetism occurs~in lattices with specific geometry when there is one fewer electron than in the half-filled system. Here, we describe a controllable method for observing Nagaoka Ferromagnetism in isolated plaquettes (four lattice sites arranged in a square) created using~optical superlattices. We next discuss the weakly coupled plaquettes and suggest several approaches for creating systems exhibiting itinerant ferromagnetism.

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Authors

  • Javier von Stecher

    JILA and Department of Physics, University of Colorado, Boulder, Colorado

  • Eugene Demler

    Physics Department, Harvard University, Cambridge-MA, 20138., Harvard University

  • Mikahil Lukin

    Physics Department, Harvard University, Cambridge-MA, 20138.

  • Ana Maria Rey

    JILA and Department of Physics, University of Colorado, Boulder, Colorado