Strong magnetic fluctuations in superconducting state of CeCoIn$_5$

Details Strong magnetic fluctuations in superconducting state of CeCoIn$_5$ Strong magnetic fluctuations in superconducting state of CeCoIn$_5$

2011-12-27

arxiv.org/abs/1112.5971v1

PRL 108, 056401 (2012)

Physics

Condensed Matter

Superconductivity

7 pages, 6 figures

Scientific paper

We show results on the vortex core dissipation through current-voltage measurements under applied pressure and magnetic field in the superconducting phase of CeCoIn$_5$. We find that as soon as the system becomes superconducting, the vortex core resistivity increases sharply as the temperature and magnetic field decrease. The sharp increase in flux flow resistivity is due to quasiparticle scattering on critical antiferromagnetic fluctuations. The strength of magnetic fluctuations below the superconducting transition suggests that magnetism is complimentary to superconductivity and therefore must be considered in order to fully account for the low-temperature properties of CeCoIn$_5$.

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