Field-induced magnetic instability within a superconducting condensate

Daniel Gabriel Mazzone (1) , Stephane Raymond (2) , Jorge Luis Gavilano (1) , Eric Ressouche (2) , Christof Niedermayer (1) , Jonas Okkels Birk (1, 3) , Bachir Ouladdiaf (4) , Gael Bastien (5) , Georg Knebel (5) , Dai Aoki (5) , Gerard Lapertot (5) , Michel Kenzelmann (6)

1 LNS - Laboratory for Neutron Scattering and Imaging [Paul Scherrer Institute]
2 MDN - Magnétisme et Diffusion Neutronique
3 DTU - Danmarks Tekniske Universitet = Technical University of Denmark
4 ILL - Institut Laue-Langevin
5 IMAPEC - Instrumentation, Material and Correlated Electrons Physics
6 Paul Scherrer Inst, Lab Sci Dev & Novel Mat, CH-5232 Villigen, Switzerland

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 fieldinduced 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 mu H-0* = 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*

Domaines: Physique [physics]

Daniel Gabriel Mazzone, Stephane Raymond, Jorge Luis Gavilano, Eric Ressouche, Christof Niedermayer, et al.. Field-induced magnetic instability within a superconducting condensate. Science Advances , 2017, 3 (5), 5 p. ⟨10.1126/sciadv.1602055⟩. ⟨hal-01691808⟩