Odd-frequency Superconductivity on a Quasi-one-dimensional Triangular   Lattice in the Hubbard Model
  In order to clarify whether the odd-frequency superconductivity can be realized or not, we study a quasi-one-dimensional triangular lattice in the Hubbard model using the random phase approximation (RPA) and the fluctuation exchange (FLEX) approximation. We find that odd-frequency spin-singlet p-wave pairing can be enhanced on a quasi-one-dimensional isosceles triangular lattice. 
Keisuke Shigeta, Seiichiro Onari, Keiji Yada, Yukio Tanaka