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Phase diagram and dynamics of the projected SO(5) symmetric model of high- T(c) superconductivity

Dorneich, A.; Hanke, W.; Arrigoni, E.; Troyer, M.; Zhang, S.C.

Physical Review Letters 88(5): 057003

2002

We present numerical studies of a quantum "projected" SO(5) model which aims at a unifying description of antiferromagnetism and superconductivity in the high- T(c) cuprates, while properly taking into account the Mott insulating gap. Our numerical results, obtained by the quantum Monte Carlo technique of stochastic series expansion, show that this model can give a realistic description of the global phase diagram of the high- T(c) superconductors and accounts for many of their physical properties. Moreover, we address the question of asymptotic restoring of the SO(5) symmetry at the critical point.

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