Superconductivity in strongly repulsive fermions: the role of kinetic-energy frustration.

نویسندگان

  • L Isaev
  • G Ortiz
  • C D Batista
چکیده

We discuss a physical mechanism of a non-BCS nature which can stabilize a superconducting state in a strongly repulsive electronic system. By considering the two-dimensional Hubbard model with spatially modulated electron hoppings, we demonstrate how kinetic-energy frustration can lead to robust d-wave superconductivity at arbitrarily large on-site repulsion. This phenomenon should be observable in experiments using fermionic atoms, e.g. 40K, in specially prepared optical lattices.

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عنوان ژورنال:
  • Physical review letters

دوره 105 18  شماره 

صفحات  -

تاریخ انتشار 2010