Multigap Superconductivity in the Ferromagnetic Superconductor UCoGe   Revealed by Thermal Conductivity Measurements
  We performed thermal conductivity measurements on a single crystal of the ferromagnetic superconductorUCoGe under magnetic field. Two different temperature dependencies of the thermal conductivity are observed, for H//b linear at low magnetic field and quadratic for magnetic field larger than 1 Tesla. At the same field value, a plateau appears in the field dependency of the residual term of thermal conductivity. Such observations suggest a multigap superconductivity with a line of nodes in the superconducting gap. 
Ludovic Howald, Mathieu Taupin and Dai Aoki
cond-mat.supr-con cond-mat.str-el