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Current Induced Depairing And Mixed State Behavior In The Bite/Fete Interfacial Superconductor, Charles Louis Dean Ii
Current Induced Depairing And Mixed State Behavior In The Bite/Fete Interfacial Superconductor, Charles Louis Dean Ii
Theses and Dissertations
The Bi2Te3/FeTe heterostructure intersects several phenomena and key classes of materials in condensed matter physics: topological insulators, superconductivity, magnetism, and the physics of interfaces. While neither the topological insulator (BiTe) nor the iron chalcogenide (FeTe) are themselves superconductors, superconductivity forms in a thin 7nm interfacial layer between the two. The restricted dimensionality and the extraordinarily conductive normal state, possibly sourced by the topologically protected surface states, have led to the observation of novel phenomena such as the Likharev vortex explosion and transitions in behavior resulting from the interplay between current induced depairing and the Berezinski-Kosterlitz-Thouless regime. The measured depairing current …
Depairing Current Density In Cuprate Superconductors, Manlai Liang
Depairing Current Density In Cuprate Superconductors, Manlai Liang
Theses and Dissertations
We report a study of the depairing critical current density in the electron-doped infinite-layer Sr1-xLaxCuO2 and Nd2-xCexCuO4-\delta system. In this work, many new apparatuses were set up to measure the samples. Resistance-versus-temperature transition curves measured at high pulsed current densities show the classic proportionality between the transition-temperature shift and the two-thirds power of the applied current. The measurement provides an assessment of the superfluid density in the system, and a secondary route for obtaining the penetration depth purely through a transport measurements.