First order superconducting transition near a ferromagnetic quantum critical point

Details First order superconducting transition near a ferromagnetic quantum critical point First order superconducting transition near a ferromagnetic quantum critical point

2002-10-29

arxiv.org/abs/cond-mat/0210653v1

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.90.077002

We address the issue of how triplet superconductivity emerges in an electronic system near a ferromagnetic quantum critical point (FQCP). Previous studies found that the superconducting transition is of second order, and Tc is strongly reduced near the FQCP due to pair-breaking effects from thermal spin fluctuations. In contrast, we demonstrate that near the FQCP, the system avoids pair-breaking effects by undergoing a first order transition at a much larger Tc. A second order superconducting transition emerges only at some distance from the FQCP.

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