Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"superconducting transition temperatures"”.
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Superconducting transition temperatures of amorphous bismuth alloy films
Measurements have been made of the critical temperatures T of c amorphous bismuth alloy films containing lead, thallium, and antimony in concentrations up to 13 atomic percent. The results indicate that the shift in T is approximately linear in impurity concentration, as c expected. The derivative …
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Growth and characterisation of textured superconducting tapes
… show that the YBCO films have a broad superconducting transition temperature irrespective of the precursor used. To improve the superconducting transition temperatures, different annealing treatments were performed on the MgO buffer deposited on Hastelloy C276, however, it was found …
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Model for an exciton mechanism of superconductivity in planar geometry
… function is also given~ A calculation of what superconducting transition temperatures one could expect to see due to this effect follows, both for the case of the exciton mechanism acting alone; and for the case of the exciton mechanism combined with the usual phononmechanism~· It is"" …
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Search for evidence of fermi surface nesting in Bi₂Sr₂Ca₁Cu₂O₈
… both the fact that these materials have high superconducting transition temperatures and have linear relaxation rates. It was suggested in that same paper that EELS might be able to confirm the presence of Fermi surface nesting. We have attempted to use transmission electron energy loss …
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Investigation of "conventional" superconductivity in ternary cerium compounds through high pressure studies
… Trends are presented for the variation of the superconducting transition temperatures with changes in external pressure;Results are also included from measurements of static magnetic susceptibility and electrical resistivity of all of the materials in the;series Ce(Ru(,1-x)Os(,x))(,3)B(,2) and …
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Lattice dynamics of Chevrel phase compounds
… in the literature obtained by measurements of superconducting tunnel junctions. The Raman data, extending over a larger energy range, complement the tunnel-junction data. The Raman data show that the energies of the phonons in these compounds are roughly independent of the particular central …
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Growth of titanium-nitride thin films for low-loss superconducting quantum circuits
… crystalline films. A review of the theory of superconducting qubits is given and recent developments in superconducting qubit research are summarized to elucidate how loss has been reduced historically and the importance of materials improvements to the future of scalable quantum computation. …
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Charge transfer states in alkali metals
… effects are observed to cause metal-to-insulator transitions at specific critical concentrations of Xe, I, Te, Sb, and Sn impurities in the Cs host lattice. These transitions are identified as being of the percolative type rather than the Mott type. The temperature dependence of conductivity near …
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Superconductivity and low temperature properties of niobium diselenide single crystals grown by direct vapor transport
… with the chemical formula NbSe₂ and the superconducting transition tempera- tures observed for these samples. X-ray photoelectron spectroscopy measurements made of the 3d<sub>3/2</sub> level of iodine incorporated in the lattice of the IVT samples indicated the iodine is present as iodide …
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Planar Tunneling Into YBCMO (M = Zinc, Nickel) Thin Films
… 0.08 (Zn), corresponding to zero-resistance superconducting transition temperatures (Tc's) of 84K, 81K, 77K (Ni) and 84K, 81K, 60K (Zn), respectively, are studied. Extensive characterization by resistivity vs. temperature measurements, scanning electron microscopy (SEM), X-ray Diffraction …
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Growth, Transport, and Tunneling Spectroscopy of Y(1-X) Pr(x) Ba(2) Cu(3) O(7) Thin Films as a Function of Crystallographic Orientation
The planar tunneling spectroscopy of superconducting, Pr-doped YBa$\rm\sb2Cu\sb3O\sb7$ thin films is reported. The tunneling conductance is studied as a function of both crystallographic orientation and Pr concentration. Tunnel junctions are fabricated on thin films grown by off-axis magnetron …
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Growth, transport, and tunneling spectroscopy of Y1̳-̳x̳Prx̳Ba2̳Cu3̳07̳ thin films as a function of crystallographic orientation
The planar tunneling spectroscopy of superconducting, Pr-doped YBa2Cu301 thin films is reported. The tunneling conductance is studied as a function of both crystallographic orientation and Pr concentration. Tunnel junctions are fabricated on thin films grown by off-axis magnetron sputter deposition …