Magnetic-field dependence of the low-temperature specific heat of the electron-doped superconductor Pr1.85Ce0.15CuO4 -: art. no. 212512

We remeasured the magnetic-field dependence of the low-temperature specific heat of the electron-doped superconductor Pr1.85Ce0.15CuO4 (T-C=22 +/- 2 K) under a different measurement procedure. Under field cooling, the electronic specific heat follows C-el(H,T)=gamma(H)T from 4.5 K down to 1.8 K. In the field range H-C1 < H < 0.5H(C2), the Sommerfeld coefficient gamma(H) is well fit by a power law gamma(H)similar to H-1/2. This result suggests that the pairing symmetry is d-wave-like at all temperatures below 4.5 K. Our new measurement shows no evidence for the linear field dependence of gamma(H) found previously at T=2 K.