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Exotic spin, charge and pairing correlations of the two-dimensional doped Hubbard model: a symmetry entangled mean-field approach

Abstract : Intertwining of spin, charge and pairing correlations in the repulsive two-dimensional Hubbard model is shown through unrestricted variational calculations, with projected wavefunctions free of symmetry breaking. A crossover from incommensurate antiferromagnetism to stripe order naturally emerges in the hole-doped region when increasing the on-site coupling. Although effective pairing interactions are identified, they are strongly fragmented in several modes including d-wave pairing and more exotic channels related to an underlying stripe. We demonstrate that the entanglement of a mean-field wavefunction by symmetry restoration can largely account for interaction effects.
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http://hal.in2p3.fr/in2p3-00805497
Contributor : Sandrine Guesnon <>
Submitted on : Thursday, April 4, 2013 - 11:48:27 AM
Last modification on : Friday, April 24, 2020 - 10:28:06 AM

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O. Juillet, R. Frésard. Exotic spin, charge and pairing correlations of the two-dimensional doped Hubbard model: a symmetry entangled mean-field approach. Physical Review B: Condensed Matter and Materials Physics, American Physical Society, 2013, 87, pp.115136. ⟨10.1103/PhysRevB.87.115136⟩. ⟨in2p3-00805497⟩

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