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arXiv · 0804.2460

Coexistence of SDW, d-wave singlet and staggered $π$-triplet superconductivity

A. Aperis·G. Varelogiannis·P. B. Littlewood·B. D. Simons
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Abstract

We have studied the competition and coexistence of staggered triplet SC with d-wave singlet SC and SDW in the mean-field approximation. Detailed numerical studies demonstrate that particle-hole asymmetry mixes these states and therefore they are simultaneously present. Even more interesting were the results of our study of the influence of a uniform magnetic field. We observe novel transitions that show the characteristics of Fulde-Ferrel phases, yet they concern transitions to different combinations of the above orders. For example, above a given field, in a particle-hole symmetric system we observe a transition from d-wave singlet SC to a state in which d-wave singlet SC coexists with staggered triplet SC and SDW. We believe our results may provide, among others, a direct explanation to recent puzzles about the Fulde Ferrel like states that are apparently observed in CeCoIn5.

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A. Aperis, G. Varelogiannis, P. B. Littlewood, B. D. Simons. 2008-04-15. Coexistence of SDW, d-wave singlet and staggered $π$-triplet superconductivity. https://doi.org/10.1088/0953-8984%2F20%2F43%2F434235

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