Home About us Contact
|
Home About us Contact | ||
|
|
||
High-temperature Superconductors (high-temperature + superconductor)
Selected AbstractsYBaCuO and REBaCuO HTS for ApplicationsINTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY, Issue 3 2007Herbert C. Freyhardt The discovery of electrical conductors that carry loss-less currents at liquid nitrogen temperatures and above, high-temperature superconductors (HTS), inspired the imaginations of scientists and engineers in an unprecedented way. It culminated in a broad search for an understanding of their basic phenomena and properties, but also for new classes of the HTS. The availability of these materials created novel ideas of their use for effective and economical generation, transport, and use of electric energy. YBaCuO and related REBaCuO HTS compounds still belong to the most attractive workhorses. This contribution intends to illustrate the efforts to manufacture from these HTS bulk monoliths, wires, tapes, or conductors, which would be needed for novel components and devices for electrical and power engineering, devices that offer not only an effective use of energy but also broad environmental benefits and, furthermore, help to safe resources. The research and developments discussed are mainly focused on efforts in Europe. [source] Can the Fulleride superconducting model (FSM) be extended?INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY, Issue 5 2005R. H. Squire Abstract The Fulleride superconducting model (FSM) is based on the existence of an electron (or Cooper) pair density wave localized on a single Fulleride molecule. Interaction of the wave with itinerant electrons at low temperature creates a pseudo-gap above the superconducting state. In addition, the interaction of the electron and the bosonic pair create a net attraction between two Fulleride molecules resulting in an intermolecular Cooper pair. This pairing interaction appears to have all the aspects of a spin liquid. This study extends the model to high-temperature superconductors and suggests that superconductivity may exist with considerably fewer molecules than in BCS theory. © 2005 Wiley Periodicals, Inc. Int J Quantum Chem, 2005 [source] Foreword to the Special Issue on spectroscopic studies on colossal magnetoresistance, high-temperature superconductors and superlattice materialJOURNAL OF RAMAN SPECTROSCOPY, Issue 10 2001P. X. Zhang No abstract is available for this article. [source] Particle,hole asymmetry in the scanning tunneling spectroscopy of the high temperature superconductorsPHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 7 2007Anna Gorczyca Abstract There is still no consensus on the mechanism that is responsible for a particle,hole asymmetry observed in scanning tunneling spectroscopy of high-temperature superconductors. According to the most popular hypothesis this asymmetry results from strong Coulomb correlations in a nearly half-filled band. In the present paper we propose another mechanism that leads to such asymmetry. It originates from the coupling between the superconductor and the substrate that the system is deposed on. We show that this coupling gives rise to the particle,hole asymmetry only in the case of an anisotropic superconductivity. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] Quasiparticle interference induced by a momentum-dependent scattering in an s-wave superconducting statePHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 2 2005P. Pisarski Abstract Fourier transformed maps of the local density of states in disordered superconducting Bi2Sr2CaCu2O8+, provided important information on the quasiparticle states and their interference in high-temperature superconductors. Neglecting the momentum-dependence of the impurity potential it is possible to disentangle the quasiparticle interference effect from the static structure factor of the scatterers. The k-dependence of the impurity potential makes such a distinction difficult. Here, for the model momentum-dependent potential, we discuss the quasiparticle interference induced by an impurity in an s-wave superconductor. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] | ||||||||||