Field-induced magnetic instability within a superconducting condensate.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 28560326.
- Also identified by DOI 10.1126/sciadv.1602055 and PMC identifier 5438216.
- Licence recorded as CC BY-NC.
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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<sub>0.05</sub>Ce<sub>0.95</sub>CoIn<sub>5</sub>, 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<sub>0</sub><i>H</i>* = 8 T. For <i>H</i> > <i>H</i>*, a spin-density phase emerges and shares many properties with the Q phase in CeCoIn<sub>5</sub>. 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 <i>H</i>*.
Medical subject headings
- Magnetic Fields
- Models, Theoretical
- Superconductivity