Artículos de revistas
Possible Fulde-Ferrell-Larkin-Ovchinnikov superconducting state in CeCoIn5
Registro en:
Physical Review Letters. American Physical Soc, v. 91, n. 18, 2003.
0031-9007
WOS:000186274800041
10.1103/PhysRevLett.91.187004
Autor
Bianchi, A
Movshovich, R
Capan, C
Pagliuso, PG
Sarrao, JL
Institución
Resumen
We report specific heat measurements of the heavy fermion superconductor CeCoIn5 in the vicinity of the superconducting critical field H-c2, with magnetic fields in the [110], [100], and [001] directions, and at temperatures down to 50 mK. The superconducting phase transition changes from second to first order for fields above 10 T for Hparallel to[110] and Hparallel to[100]. In the same range of magnetic fields, we observe a second specific heat anomaly within the superconducting state. We interpret this anomaly as a signature of a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) inhomogeneous superconducting state. We obtain similar results for Hparallel to[001], with the FFLO state occupying a smaller part of the phase diagram. 91 18