D. J. Baar

TL;DR: The total specific heat is best described by including two predictions for the electronic specific heat of $d$-wave superconductivity: a term in zero field and an increased linear term in a magnetic field applied perpendicular to the Cu${\mathrm{O}}_{2}$ planes.

TL;DR: Systematic studies of the influence of Zn and Ni impurities on the surface impedance indicate that these properties are very sensitive to defects and this sensitivity provides further insight into the pairing state.

TL;DR: Microwave surface resistance measurements on two very-high-quality YBa2Cu3O6.95 crystals are reported, inferring that λ2(0)/λ2(T) is well approximated by the simple function 1-t2, and that the low-temperature data are incompatible with the existence of an s-wave, BCS-like gap.

TL;DR: In this paper, high quality YBa2Cu3O7-x (YBCO) single crystals have been grown by a flux method and characterized by low field magnetization, a−b plane resistivity, microwave surface resistance and heat capacity measurements.

TL;DR: In this article, the authors show that the residual conductivities of these twin-free crystals are very small, implying a residual conductivity of the order of the minimum value predicted by Lee Phys. Rev. Lett. 71 1837 1993 for a $d$-wave superconductor.