Singlet pairing and superconductivity in t−J ladders with Mott insulating stripes

  title={Singlet pairing and superconductivity in 
 ladders with Mott insulating stripes},
  author={Chen Cheng and Rubem P. Mondaini and Marcos Rigol},
  journal={Physical Review B},
Pairing in superconductors occurs in a variety of channels and can be produced by various mechanisms. Here, we show that, in the presence of strong correlations, a novel singlet-pair superconducting phase can occur in ladder geometries with the fermions in the pairs residing on different sides of a Mott insulating stripe. The antiferromagnet correlations in the Mott stripe provide the pairing "glue" in such a phase. We study, using the density matrix renormalization group method, the ground… 
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