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Phys Rev Lett. 2010 May 28;104(21):216403. Epub 2010 May 25.

Magnetic-field-induced pattern of coexisting condensates in the superconducting state of CeCoIn5.

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1
Department of Physics, National Technical University of Athens, GR-15780 Athens, Greece.

Abstract

CeCoIn5 is an anomalous superconductor which exhibits a high-magnetic-field phase that consists of a modulated magnetic coupling together with persistent superconducting order. Here we use a generic microscopic model to argue that this state is a pattern of coexisting condensates: a d-wave singlet superconducting (SC) state, a staggered π-triplet SC state, and a spin density wave (SDW). Our microscopic picture allows a calculation of the phase diagram, and physical consequences including NMR. We interpret the appearance of the SDW order in the Q phase as being induced by odd-triplet pairing.

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