title: First-order superconducting transition near a ferromagnetic quantum critical point.
abstract: 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 T(c) 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 T(c). A second order superconducting transition emerges only at some distance from the FQCP.
authors.affiliation: Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA.
authors.forename: Andrey V
authors.initials: AV
authors.lastname: Chubukov
authors.forename: Alexander M
authors.initials: AM
authors.lastname: Finkel'stein
authors.forename: Robert
authors.initials: R
authors.lastname: Haslinger
authors.forename: Dirk K
authors.initials: DK
authors.lastname: Morr