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The competition and coexistence of spin density waves with d-wave singlet and staggered ð-triplet superconductivity order parameters is studied in detail within a multicomponent mean-field treatment. The presence of particle-hole asymmetry is enough to force the above orders to coexist on a tetragonal system. An extensive numerical study of the influence of a Zeeman field has revealed cascades of transitions that we believe may be of relevance to the apparent FFLO-like state recently observed in heavy fermion superconductor CeCoIn5. We focus on the parameter space where qualitatively new and relevant states are reproduced by our model and present data on its thermodynamic and magnetic properties along with H-T phase diagrams. (see e.g. arxiv:0804.2460) |
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