Mechanism of High Temperature Superconductivity in a striped Hubbard Model

Details Mechanism of High Temperature Superconductivity in a striped Hubbard Model Mechanism of High Temperature Superconductivity in a striped Hubbard Model

2003-09-25

arxiv.org/abs/cond-mat/0309572v5

Phys. Rev. B 69, 214519 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages; 1 figure; newly updated version; new reference and quoatation marks

Scientific paper

10.1103/PhysRevB.69.214519

It is shown, using asymptotically exact methods, that the two dimensional repulsive Hubbard model with strongly modulated interactions exhibits ``high temperature superconductivity". Specifically, the explicit modulation, which has the same symmetry as period 4 bond-centered stripes, breaks the system into an alternating array of more and less heavily hole doped, nearly decoupled two-leg ladders. It is shown that this system exhibits a pairing scale determined by the spin-gap of the undoped two-leg ladder, and a phase ordering temperature proportional to a low positive power of the inter-ladder coupling.

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