We show the theoretical depairing current limit can be achieved in a robust fashion in highly ordered superconductor nanomesh films having spatial periodicities smaller than both the superconducting coherence length and the magnetic penetration depth. For a niobium nanomesh film with 34 nm spatial periodicity, the experimental critical current density is enhanced by more than 17 times over the ...

At CERN a compact Quadrupole Resonator has been re-commissioned for the RF characterization of superconducting materials at 400 MHz. In addition the resonator can also be excited at multiple integers of this frequency. Besides Rs it enables determination of the maximum RF magnetic field, the thermal conductivity and the penetration depth of the attached samples, at different temperatures. The f...

We report muon-spin rotation and relaxation (muSR) measurements on single crystals of the electron-doped high-T(c) superconductor Pr2-xCexCuO4. In a zero external magnetic field, superconductivity is found to coexist with dilute Cu spins that are static on the muSR time scale. In an applied field, we observe a mu(+)-Knight shift that is primarily due to the magnetic moment induced on the Pr ion...

We have performed ZF-lSR measurements of Sr 2 RuO 4 and have observed a spontaneous magnetic "eld below 1 # . This observation, combined with other symmetry considerations demonstrates that superconductivity in Sr 2 RuO 4 is of &p-wave' (odd-parity) type. Our transverse "eld lSR measurements in the mixed state with B"150 GDDc( clearly indicate the presence of a square #ux lattice. We have analy...

The c-axis optical properties of cuprate superconductors have been studied by grazing angle re ectivity technique. We tested the interlayer tunnelling (ILT) model of high temperature superconductivity and showed that the basic relation between the condensation energy of the superconducting state and the interlayer Josephson coupling does not hold for Tl2Ba2CuO6. Measuring the re ectivity at an ...

The synthesis and crystallographic, thermodynamic, and transport properties of single crystalline Rh 9 In 4 S 4 were studied. The resistivity, magnetization, and specific heat measurements all clearly indicate bulk superconductivity with a critical temperature, T c ∼ 2.25 K. The Sommerfeld coefficient γ and the Debye temperature(Θ D) were found to be 34 mJ mol −1 K −2 and 217 K, respectively. T...

Quantitative theories of superconductivity in alkali-doped C(60) require an accurate and detailed description of the Fermi surface. First-principles calculations of Fermi-surface properties and electronic parameters for K(3)C(60), the prototype fulleride-superconductor, are reported. The Fermi surface has two sheets; the first is free-electron-like, and the second is multiply-connected, forming...

The Gaussian Effective Potential in a fixed transverse unitarity gauge is studied for the static three-dimensional U(1) scalar electrodynamics (Ginzburg-Landau phenomenological theory of superconductivity). In the broken-symmetry phase the mass of the electromagnetic field (inverse penetration depth) and the mass of the scalar field (inverse correlation length) are both determined by solution o...

We report on generic trends in the behavior of the interlayer penetration depth c of several different classes of quasi-two-dimensional superconductors including high-Tc cuprates, Sr2RuO4, transition-metal dichalcogenides and organic materials of the (BEDT-TTF)2X series. An analysis of these trends reveals two distinct patterns in the scaling between the values of c and the magnitude of the c-a...