Multigap Superconductivity in the Ferromagnetic Superconductor UCoGe Revealed by Thermal Conductivity Measurements

Figure 3

Ratio of the superconducting to normal state value of the electronic contribution to thermal conductivity. (a) This ratio is linear in temperature at low fields  T and quadratic in temperature for higher fields (b). (c) The two temperature dependencies are best viewed in a double logarithmic plot after subtraction of the residual term . was linearly extrapolated from panels (a) and (b) in the temperature ranges and , respectively.

(a)

(b)

(c)