Superconductivity in a Quasi One Dimensional Spin Liquid
M. Sigrist, T. M. Rice, F. C. Zhang
Abstract
The single rung t-J ladder is analyzed in a mean field theory using Gutzwiller renormalization of the matrix elements to account for strong correlation. The spin liquid (RVB) state at half-filling evolves into a superconducting state upon doping. The order parameter has a modified d-wave character. A lattice of weakly coupled ladders should show a superconducting phase transition.
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