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Field-induced magnetic instability within a superconducting condensate.

ABSTRACT: The application of magnetic fields, chemical substitution, or hydrostatic pressure to strongly correlated electron materials can stabilize electronic phases with different organizational principles. We present evidence for a field-induced quantum phase transition, in superconducting Nd_0.05Ce_0.95CoIn₅, that separates two antiferromagnetic phases with identical magnetic symmetry. At zero field, we find a spin-density wave that is suppressed at the critical field ?₀H* = 8 T. For H > H*, a spin-density phase emerges and shares many properties with the Q phase in CeCoIn₅. These results suggest that the magnetic instability is not magnetically driven, and we propose that it is driven by a modification of superconducting condensate at H*.

SUBMITTER: Mazzone DG

PROVIDER: S-EPMC5438216 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature

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Field-induced magnetic instability within a superconducting condensate.

Mazzone Daniel Gabriel DG Raymond Stéphane S Gavilano Jorge Luis JL Ressouche Eric E Niedermayer Christof C Birk Jonas Okkels JO Ouladdiaf Bachir B Bastien Gaël G Knebel Georg G Aoki Dai D Lapertot Gérard G Kenzelmann Michel M

Science advances 20170519 5

The application of magnetic fields, chemical substitution, or hydrostatic pressure to strongly correlated electron materials can stabilize electronic phases with different organizational principles. We present evidence for a field-induced quantum phase transition, in superconducting Nd0.05Ce0.95CoIn5, that separates two antiferromagnetic phases with identical magnetic symmetry. At zero field, we find a spin-density wave that is suppressed at the critical field μ< ...[more]

PMID: 28560326

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