Order parameter and vortices in the superconducting Q-phase of CeCoIn5

Abstract

Recently, it has been reported that the low-temperature high-magnetic field phase in CeCoIn5 (Q-phase), has spin-density wave (SDW) order that only exists within this phase. This indicates that the SDW order is the result of the development of pair density wave (PDW) order in the superconducting phase that coexists with d-wave superconductivity. Here we develop a phenomenological theory for these coexisting orders. This provides selection rules for the PDW order and further shows that the detailed structure of this order is highly constrained. We then apply our theory to the the vortex phase. This reveals vortex phases in which the d-wave vortex cores exhibit charge density wave (CDW) order and further reveals that the SDW order provides a unique probe of the vortex phase.

4 pages, 2 figures, 1 table

References in corpus (5)

• Fulde-Ferrell-Larkin-Ovchinnikov State in Heavy Fermion Superconductors
• Dynamical layer decoupling in a stripe-ordered, high T_c superconductor
• Dislocations and vortices in pair density wave superconductors
• Coexistence of SDW, d-wave singlet and staggered $\pi$-triplet superconductivity
• Coupled SDW and Superconducting Order in FFLO State of CeCoIn${}_5$

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