Susmita Basak,1 Tanmoy Das,1 Hsin Lin,1 J. Nieminen,1,2 M. Lindroos,1,2 R. S. Markiewicz,1,3,4 and A. Bansil1 1Physics Department, Northeastern University, Boston, Massachusetts 02115, USA 2Institute of Physics, Tampere University of Technology, P.O. Box 692, 33101 Tampere, Finland 3SMC-INFM-CNR, Dipartimento di Fisica, Università di Roma “La Sapienza,” P. Aldo Moro 2, 00185 Roma, Italy 4ISC-CN...

We report on a microscopic calculation of the current and magnetic field distribution in the mixed state of model s-wave and d-wave superconductors. For the d-wave case, we find that corrections to London theory are important at fields small compared to Hc2. The field distribution is influenced by both superfluid-velocity dependence and non-locality in the current response function of the mixed...

We have determined the crystal structure of the single-phase stoichiometric high-temperature superconductor in the Y-Ba-Cu-O system using high-resolution neutron powder diffraction. This compound has an orthorhombic structure with space group Pmmm and lattice constants a = 3.8231 A, b = 3.8864 A, and c = 11.6807 A. The structure consists of "dimpled" Cn02 layers in the a-b planes loosely bonded...

Crucially important for application of type-II superconductor films is the stability of the vortex matter--magnetic flux lines penetrating the material. If some vortices get detached from pinning centres, the energy dissipated by their motion will facilitate further depinning, and may trigger a massive electromagnetic breakdown. Up to now, the time-resolved behaviour of these ultra-fast events ...

We derive the theory of the quantum (zero temperature) superconductor to metal transition in disordered materials when the resistance of the normal metal near criticality is small compared to the quantum of resistivity. This can occur most readily in situations in which “Anderson’s theorem” does not apply. We explicitly study the transition in superconductor-metal composites, in an swave superc...

We report the discovery of a low-temperature phase transition in Bi2Sr2Ca(NixCu1−x)208 high temperature superconductor. This transition manifests itself as a sharp reduction of the thermal conductivity of the samples at a temperature T∗c ≈ 200 mK. The temperature dependence of the thermal conductivity changes dramatically from T with α between 1.6 and 1.75 above the transition to T-linear behav...

After a detailed characterization of the (Hg,Re)-1223 polycrystalline samples, the pseudogap temperature T ∗, fluctuation temperature Tscf and the superconducting critical temperature Tc have been systematically studied through electrical resistivity ρ measurements by several different current densities. Performing many set of measurements with different current densities we show that, while lo...

Two types of miniaturized high-temperature superconducting filters are described in this paper. The first type is developed by using small-sized microstrip spiral resonators, and the second type by coplanar waveguide quarter-wavelength resonators. The filters have significantly reduced size compared with many previous HTS filters. They are designed by employing an electromagnetic simulator in c...