First order superconducting phase transition in CeCoIn$_5$

Details First order superconducting phase transition in CeCoIn$_5$ First order superconducting phase transition in CeCoIn$_5$

2002-03-14

arxiv.org/abs/cond-mat/0203310v1

Phys.Rev.Lett.89:137002,2002

Physics

Condensed Matter

Superconductivity

5 pages, includes three figures

Scientific paper

10.1103/PhysRevLett.89.137002

We investigated the magnetic field dependence of the superconducting phase transition in heavy fermion CeCoIn_5 (T_c = 2.3 K) using specific heat, magneto-caloric effect, and thermal expansion measurements. The superconducting transition becomes first order when the magnetic field is oriented along the 001 crystallographic direction with a strength greater that 4.7 T, and transition temperature below T_0 ~ 0.31 T_c. The change from second order at lower fields is reflected in strong sharpening of both specific heat and thermal expansion anomalies associated with the phase transition, a strong magnetocaloric effect, and a step-like change in the sample volume. The first order superconducting phase transition in CeCoIn_5 is caused by Pauli limiting in type-II superconductors, and was predicted theoretically in the mid 1960s. We do not see evidence for the inhomogeneous Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconducting state (predicted by an alternative theory also dating back to mid-60's) in CeCoIn_5 with field H || [001].

Affiliated with

Also associated with

No associations

Rating

First order superconducting phase transition in CeCoIn$_5$ does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with First order superconducting phase transition in CeCoIn$_5$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First order superconducting phase transition in CeCoIn$_5$ will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-9269