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A Mott insulator of fermionic atoms in an optical lattice

Author

Listed:
  • Robert Jördens

    (Institute for Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland)

  • Niels Strohmaier

    (Institute for Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland)

  • Kenneth Günter

    (Institute for Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland
    Laboratoire Kastler Brossel, École Normale Supérieure, 24 rue Lhomond, 75005 Paris, France)

  • Henning Moritz

    (Institute for Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland)

  • Tilman Esslinger

    (Institute for Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland)

Abstract

Fermionic Mott insulator In a Mott insulator, suppression of conductivity occurs as a result of electron interactions. Proximity to this phase causes intriguing phenomena in fermionic condensed matter systems, most notably high-temperature superconductivity. The Hubbard model, which encompasses the essential physics of the Mott insulator, can be realized with quantum gases trapped in an optical lattice. Therefore, experimental tools developed in atomic physics can be used to study this regime. However, an atomic Mott insulator has so far been realized only with a gas of bosons, which lack the rich and peculiar nature of fermions. The authors report the formation of a Mott insulator of a repulsively interacting two-component Fermi gas in an optical lattice. The results pave the way for further studies of the Mott insulator, including spin-ordering and ultimately the question of d-wave superfluidity.

Suggested Citation

  • Robert Jördens & Niels Strohmaier & Kenneth Günter & Henning Moritz & Tilman Esslinger, 2008. "A Mott insulator of fermionic atoms in an optical lattice," Nature, Nature, vol. 455(7210), pages 204-207, September.
    • Handle: RePEc:nat:nature:v:455:y:2008:i:7210:d:10.1038_nature07244
    DOI: 10.1038/nature07244
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