Coexistence of s-wave Superconductivity and Antiferromagnetism
Abstract
We study the phase diagram of a new model that exhibits a first order transition between s-wave superconducting and antiferromagnetic phases. The model, a generalized Hubbard model augmented with competing spin-spin and pair-pair interactions, was investigated using the projector Quantum Monte Carlo method. Upon varying the Hubbard U from attractive to repulsive we find a first order phase transition between superconducting and antiferromagnetic states.
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