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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 20 of 53 for “"high temperature superconductor"”.
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Modifying the Composition of a High Temperature Superconductor
… purpose of this research was to recreate a known superconductor, YBa<sub>2</sub>Cu<sub>3</sub>O<sub>x</sub>, and modify it in an attempt to raise its transition temperature. A superconductor is any material that excludes magnetic flux from its interior when at a temperature below its transition …
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Resistivity and paraconductivity in the high temperature superconductor YBa2̳Cu3̳O7̳-̳y̳
… YBa2cu 3o7 _y· The resistivity was linear in temperature for all samples far from T . c In polycrystalline samples the deviation from linearity near Tc has been analyzed in terms of the Aslamazov-Larkin threedimensional {AL3D) fluctuation model on six separate samples. The value of the BCS …
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Fabrication and Electronic Transport Properties of Underdoped High Temperature Superconductor Nanowires
… the superconducting and pseudogap states in the high-Tc cuprates, we have measured the electronic transport properties of underdoped, high-Tc nanowires and nanostructures. The sizes of the samples involved allow for the investigation of the electronic structure on a mesoscopic length scale. We …
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Fabrication and Electronic Transport properties of Underdoped High Temperature Superconductor Nanowires
… the superconducting and pseudogap states in the high-Tc cuprates, we have measured the electronic transport properties of underdoped, high-Tc nanowires and nanostructures. The sizes of the samples involved allow for the investigation of the electronic structure on a mesoscopic length scale. We …
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Measurement of the vortex depinning force in a high temperature superconductor
… The dual driving force of commercial demand for high-temperature superconductors (HTSC's), coupled with the intense basic science interest in uncovering the elusive mechanism that explains high temperature superconductivity has led to some ten thousand publications since the discovery of LaBaCuO4 …
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Characterizing and using defects in high-temperature superconductor cables and magnets
High-temperature superconductor (HTS) cables and magnets are enabling a range of high-current and high-field applications, including compact fusion devices aiming to achieve net energy. Defects in HTS pose manufacturing, cost, and operational challenges. A rigorous understanding and predictive …
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Variable Temperature Scanning Tunneling Microscopy Study of a High Temperature Superconductor BSCCO
Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs
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Variable Temperature Scanning Tunneling Microscopy Study of a High Temperature Superconductor Bi2Sr2CaCu2O8+d
… the electronic states of a slightly underdoped high-TC superconductor Bi2Sr2CaCu2O8+d as a function of temperature. We have demonstrated for the first time that atomicallyresolved spectroscopic studies at elevated temperatures are possible. We have used this new experimental capability to map …
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Quench dynamics and fiber optic quench detection of VIPER high temperature superconductor cable
High temperature superconductors (HTS) enable many high field magnet applications—such as magnetic fusion devices—to operate at superior current densities, temperatures, and fields compared to low temperature superconductor (LTS) based magnets. However, HTS introduces new challenges: slow quench …
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Imaging the two gaps of the high temperature superconductor Pb-Bi₂Sr₂CuO₆₊x
The nature and behavior of electronic states in high temperature superconductors are the center of much debate. The pseudogap state, observed above the superconducting transition temperature Tc, is seen by some as a precursor to the superconducting state. Others view it as a competing phase. …
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Angle-Resolved Photoemission Studies on the Many-Body Effects of High-Temperature Superconductor: Bi-2212
… a essential role in the pairing mechanism of high temperature superconductors. Unconventional superconductors such as cuprates are believed to exhibit spin-fluctuation-mediated pairing, as opposed to conventional superconductors where phonons mediate Cooper pairing. Dynamic spin susceptibility …
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Nuclear magnetic resonance studies of the effect of vortices on the high temperature superconductor YBa2̳Cu3̳O7̳
Nuclear Magnetic Resonance in the material YBa2Cu307 is strongly affected by the presence of magnetic vortices. The effects produced by the vortices can be used to gain knowledge about the physics of vortices and the physics of these materials. NMR nutation curves show that the vortices produce …
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Resistivity and paraconductivity in the high-temperature superconductor yttrium barium(2) copper(3) oxygen(7-y)
… 7-y}$. The resistivity was linear in temperature for all samples far from T$\sb{\rm c}$.
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Nuclear Magnetic Resonance Studies of the Effect of Vortices on the High Temperature Superconductor Yttrium Barium Copper Oxide
Nuclear Magnetic Resonance in the material YBa2Cu3O 7 is strongly affected by the presence of magnetic vortices. The effects produced by the vortices can be used to gain knowledge about the physics of vortices and the physics of these materials. NMR nutation curves show that the vortices produce …
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Investigating the relationship between the superconducting and pseudogap states of the high-temperature superconductor Bi-2201 using scanning tunneling microscopy
… the superconducting and pseudogap states of high-temperature superconductors. Although there exist a large number of theories regarding their relationship, the theories fall into one of two broad classes. The first class views the superconducting state as intrinsically tied to the pseudogap …
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Microstructural control and superconducting properties of YBa₂Cu₃O₇₋ₓ melt textured single crystals
"The high temperature superconductor has great potential for practical applications such as superconducting energy storage systems. Since the levitation force, required specifically for these applications, largely depends on the critical current density and loop size of the superconducting current, …
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Single crystal NMR of high-temperature superconductors
The author reports Cu NMR studies of the high temperature superconductor YBa$\sb2$Cu$\sb3$O$\sb{7-\delta}$ (T$\sb{\rm c}$ = 90K) using a 1 mg single crystal.
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Formulating design rules to predict 2D materials and heterostructures for next-generation electronics
… of elements for a “beyond-silicon” device, or a high-temperature superconductor. In this thesis, by employing first-principles quantum theory methods, physics-based model Hamiltonian analysis, and high-performance computing, the structure-property relationships of two-dimensional materials, their …
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Nanoscale Josephson Devices
… the study of c-axis Josephson junctions in the high temperature superconductor Tl2Ba2CaCu2O8, the fabrication of superconducting quantum interference devices with sub-micron loop areas, and GaN light emitting diodes. The main body of research was carried out in the study of Nb based Josephson …
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